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Yom Kippur War Timeline: The 1973 Surprise Attack That Exposed Israel’s Intelligence Failure

📅 Last updated: 22 October 2026📖 23 milestones🌐 Newest first
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In short

Yom Kippur War timeline: how Egypt and Syria surprised Israel on 6 October 1973, the missed warnings, the Agranat inquiry and the US review compared.

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The Yom Kippur War intelligence failure was not a lack of information. On 6 October 1973 Egypt and Syria attacked Israel at about 14:00 on the holiest day of the Jewish year, although Israeli and American analysts had indicators in front of them. Israeli Military Intelligence leaned on an assumption known as the Concept, rated war “lower than low” the day before, and the clearest warning, from a Mossad source, arrived only hours ahead. The fighting ended in stages between 22 and 25 October, the Agranat Commission removed senior officers, and Golda Meir resigned in April 1974. The United States made a separate set of errors, which its own December 1973 post-mortem described. For the regional background, see AiTimeline’s Middle East tensions timeline; for another famous warning failure, Pearl Harbor.

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💡 Short Answer

Israel was surprised because its intelligence chiefs believed Egypt and Syria would not attack, and read the evidence through that belief. Warning signs included a US memo in May, Soviet departures in early October, and a Mossad warning relayed on 5–6 October. The attack began on 6 October 1973; ceasefires took effect between 22 and 25 October. The Agranat Commission, which reported from April 1974, held the military leadership responsible and cleared Meir of direct responsibility.

⚡ Yom Kippur War Quick Facts
Attack6 Oct 1973, ~14:00
Ceasefire22–25 Oct 1973 (staged)
Zeira’s odds“Lower than low” (5 Oct)
Commission set up18 Nov 1973
Interim report1 Apr 1974
Meir resigns11 Apr 1974
⚡ Quick Answers — AI Overview Ready

Yom Kippur War: Key Questions

When did it start and end?
It started on 6 October 1973 at about 14:00. Resolutions 338 (22 October) and 339 (23 October) led to ceasefires on 24–25 October, and the Km 101 agreement followed on 11 November.
Why was Israel surprised?
Military Intelligence relied on the Concept, which held that Egypt would not attack without the capabilities it lacked and Syria not without Egypt, and discounted contrary signs.
Did the US fail too?
Yes, differently. The December 1973 US post-mortem blamed preconceptions about Arab weakness and reliance on Israeli assessments, not gaps in collection.
What did the Agranat Commission decide?
It held Chief of Staff Elazar responsible and recommended removing him and several intelligence and field officers, but made no ruling on Dayan and cleared Meir of direct responsibility.
📚 Key Takeaways

The 1973 Surprise in Ten Points

  • The attack: 6 October 1973, about 14:00, on Yom Kippur and in Ramadan.
  • The ceasefire: adopted on 22 and 23 October, effective 24–25 October, not on one date.
  • The assumption: the Concept, an Israeli belief about when Egypt and Syria would fight.
  • The odds: Zeira said “lower than low” on 5 October.
  • The warning: Marwan’s message, dated 5 October, said “dusk”; the war began at 14:00.
  • The decision: on 6 October Meir chose a larger mobilisation and rejected a pre-emptive strike.
  • The inquiry: Agranat, appointed 18 November 1973; interim report 1 April 1974.
  • The politics: Meir announced her resignation on 11 April 1974.
  • The US: its own post-mortem found analysis, not collection, failed.
  • The caution: casualty totals vary by source; this page does not endorse one figure.

Yom Kippur War Timeline, Latest First

Each entry is tagged by thread and ends with why it matters. Use the filter to isolate the warnings, the fighting, the inquiry or the diplomacy.

🎯 Interactive: Filter the Timeline

Warnings, the fighting, the inquiry or the diplomacy? Filter the timeline by thread.

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A reported Israeli investigation reopens the Marwan question Inquiry

2025Reported via WikipediaAiTimeline has not seen the report

Wikipedia reports that a 2025 Israeli investigation concluded Ashraf Marwan was a central figure in an Egyptian deception campaign and that his final warning before the war was imprecise and came too late to be useful (Wikipedia). Other accounts treat him as a genuine Mossad source: historian Uri Bar-Joseph concluded he was real, and in 2022 a former Egyptian intelligence officer said he was not a double agent.

AiTimeline has not read the 2025 report and treats this as disputed. The debate matters because it shows the 1973 warning was still being argued over five decades on.

Why it matters: Even the best-known warning of the war has no settled reading.

Israel’s State Archives release Zamir’s 5 October communique Inquiry

17 Sep 2018 reportMossad to the Prime Minister’s military secretaryDeclassified

A declassified Mossad communique dated 5 October 1973 from chief Zvi Zamir said the Egyptian and Syrian armies were “poised to launch an attack on Israel on Saturday 6.10.73 at dusk,” and quoted the source, Ashraf Marwan, as putting the chance of attack at 99 percent. Zamir said the military secretary held the message for about ten hours before passing it to Golda Meir (The Times of Israel). The same release included General Staff transcripts from the day before the war.

The attack began at about 14:00, not at dusk. The warning was specific and mostly right, but its timing was off, which is one reason the question of how much it should have changed Israeli decisions is still argued.

Why it matters: Documents show what was known; they do not settle how it should have been weighed.

Egypt and Israel sign a peace treaty after Camp David Diplomacy

17 Sep 1978 Camp David Accords26 Mar 1979 treatyWashington

The Camp David Accords were signed on 17 September 1978 and Egypt and Israel signed their peace treaty in Washington on 26 March 1979 (Wikipedia; Wikipedia). Israel completed its withdrawal from Sinai in 1982.

The 1973 war did not end the conflict, but it changed the calculation on both sides: Egypt had shown it could fight and Israel had been shown it could be surprised.

Why it matters: A war that began as a surprise attack became the opening of the first Arab-Israeli peace treaty.

The Agranat Commission delivers its later reports Inquiry

10 Jul 1974 second part30 Jan 1975 final report1,500+ pages

The commission published a second part on 10 July 1974 and presented its final report on 30 January 1975 (Wikipedia). Israel’s Defence Ministry archive says the final report ran to more than 1,500 pages and that only its introduction was made public (IDF and Defence Establishment Archives).

Most of the evidence therefore remained closed for decades, which is why later releases such as the 2018 communique drew so much attention.

Why it matters: The public saw the conclusions, but not most of the record behind them.

Syria disengages and Rabin succeeds Meir Diplomacy

31 May 1974 Syria ceasefire line3 Jun 1974 new government

An Israel-Syria disengagement agreement ended fighting on the Golan front on 31 May 1974 (Wikipedia). Yitzhak Rabin succeeded Golda Meir as prime minister on 3 June 1974 (Wikipedia).

Why it matters: Both the northern front and the leadership were reset within weeks of each other.

Golda Meir announces her resignation Inquiry

11 Apr 1974Some accounts say 10 AprAfter the interim report

Golda Meir resigned as prime minister on 11 April 1974 (the Agranat interim report was nine days earlier; some accounts date the announcement to 10 April). She said: “Five years are sufficient … It is beyond my strength to continue carrying this burden” (Wikipedia). The commission had cleared her of direct responsibility for the early failures.

She was not found responsible by the commission, but public anger and the political fallout still ended her government.

Why it matters: A leader cleared by the inquiry still resigned over the war.

The Agranat Commission publishes its interim findings Inquiry

1 Apr 1974Chaired by Chief Justice Shimon AgranatFive members

The first report found that Chief of Staff David Elazar “bears personal responsibility for the assessment of the situation and the preparedness of the IDF” and recommended his removal; Elazar resigned straight after (Wikipedia). It recommended removing four military-intelligence officers: Maj. Gen. Eli Zeira, his deputy Brig. Aryeh Shalev, Lt. Col. Yona Bendman and Lt. Col. David Gedalia, as well as Southern Command chief Shmuel Gonen (Wikipedia).

The commission said it could not judge Defence Minister Moshe Dayan and, in the words quoted on Wikipedia, held that a minister who relies on his advisers “does not bear any personal responsibility.” That limit on its scope became a lasting part of the controversy.

Why it matters: The inquiry removed officers but left the question of political responsibility open.
Scaled timeline from the October 1973 war to the Agranat Commission's final report in January 1975
Chart: from the war to the Agranat final report, October 1973 to January 1975. Chart by AiTimeline from the Defence Ministry archives and Wikipedia.

Egypt and Israel agree on a disengagement of forces Diplomacy

18 Jan 1974Suez Canal front

An Egypt-Israel disengagement agreement was signed on 18 January 1974 and sporadic fighting on the Egyptian front ended (Wikipedia).

Why it matters: The ceasefire turned into a first negotiated pullback.

The US intelligence community publishes its post-mortem Inquiry

20 Dec 1973Intelligence Community StaffPreliminary report

A preliminary US post-mortem concluded there had been an intelligence failure: analysts “did not perceive the growing possibility of an Arab attack or warn of its imminence,” although collection was adequate and the warning material was “plentiful, ominous, and often accurate,” if not conclusive (Office of the Historian). It blamed preconceptions about Arab weakness, a “cry wolf” effect and heavy reliance on Israeli assessments that were nearly unanimous that war was unlikely.

This is a separate American finding. It does not describe Israel’s internal intelligence process, which the Agranat Commission examined.

Why it matters: Washington audited its own analysts; Jerusalem audited its own.

Israel appoints the Agranat Commission Inquiry

18 Nov 1973Commissions of Inquiry Law, 1968

Israel’s government set up a commission of inquiry on 18 November 1973 to examine the intelligence on Egyptian and Syrian intentions, how it was analysed and the IDF’s readiness, especially on 5 October (IDF and Defence Establishment Archives). Wikipedia dates it 21 November; AiTimeline uses the ministry archive. The members were Chief Justice Shimon Agranat, Justice Moshe Landau, State Comptroller Yitzhak Nebenzahl and former chiefs of staff Yigael Yadin and Chaim Laskov (Wikipedia).

Why it matters: A judicial commission, not the army itself, was asked to examine the warning failure.

Egypt and Israel sign a ceasefire agreement at Kilometre 101 Diplomacy

11 Nov 1973Cairo-Suez RoadFirst Egypt-Israel agreement since 1949

Generals Aharon Yariv for Israel and Mohamed el-Gamasy for Egypt signed a six-point agreement at kilometre 101 on the Cairo-Suez road on 11 November 1973, covering supplies to the city of Suez, an exchange of prisoners and replacing Israeli checkpoints with UN ones (Jewish Virtual Library).

Why it matters: The first Egyptian-Israeli agreement since the 1949 armistice.

UN-backed ceasefires end the fighting Diplomacy

22-25 Oct 1973Resolutions 338 and 339Hermon retaken 22 Oct

Security Council Resolution 338 was adopted on 22 October by 14–0 and the ceasefire was due to take effect at 6:52 pm Israeli time, but fighting continued. Resolution 339 followed on 23 October, adopted 14–0 with China not voting (Wikipedia). A fresh ceasefire on 24 October halted the Israeli advance toward Cairo, and a second on 25 October officially ended the conflict (Wikipedia). Golani and Sayeret Matkal commandos retook the Hermon outpost on 22 October.

The war began on 6 October; the ceasefire took effect in stages between 22 and 25 October, not on a single day.

Why it matters: Two resolutions and several days were needed to stop a war of nearly three weeks.
Scaled timeline of the Yom Kippur War from 6 to 25 October 1973 including the ceasefire stages
Chart: the 17 days of the war and the staged ceasefire, 6 to 25 October 1973. Chart by AiTimeline from Wikipedia and the UN.

Arab oil exporters announce an embargo Diplomacy

17 Oct 1973OAPECSome sources say 16 Oct

OAPEC announced an oil embargo and production cuts against countries backing Israel on 17 October 1973; some sources date the start to 16 October. It ended in March 1974, after the price of oil had risen close to threefold (Wikipedia). See AiTimeline’s OPEC timeline.

Why it matters: A regional war became a global energy shock.

Israeli forces cross the Suez Canal The fighting

15-16 Oct 1973West bank of the canal

Israeli paratroopers crossed the Suez Canal on the night of 15 October, north of the Great Bitter Lake, in what Wikipedia calls Operation Gazelle, and the bridgehead on the west bank threatened Egyptian supply lines (Wikipedia).

Why it matters: A tactical recovery that changed the diplomacy, though not the opening surprise.

Israel tries to retake Hermon and accepts a ceasefire in place The fighting

8-12 Oct 1973Golan and SinaiSadat refuses

An Israeli attempt to retake the Hermon outpost on 8 October failed. On 12 October Israel accepted a ceasefire in place, and Sadat refused (Wikipedia).

Why it matters: Early reversals pushed Israel toward a ceasefire it had no leverage to impose.

Egypt and Syria attack on Yom Kippur The fighting

6 Oct 1973, about 14:00Suez Canal and Golan HeightsAlso 10 Ramadan

Operation Badr began at 14:00 with an air strike of more than 200 Egyptian aircraft, followed by a 53-minute artillery barrage. Egyptian infantry crossed the canal from 14:05 in twelve waves, about 32,000 men by 17:30 (Wikipedia). Syrian forces attacked on the Golan. Syrian paratroopers took the Israeli observation base on Mount Hermon around 17:00 on the first day, 6 October; the AiTimeline draft brief dated it 7 October.

The date fell on Yom Kippur and in Ramadan. Early Israeli losses showed the cost of limited warning and a partly mobilised army.

Why it matters: The opening hours caught Israel on two fronts with a thinly held line.

Meir, Dayan and Elazar decide how far to mobilise The fighting

6 Oct 1973, 08:05Prime Minister’s officeNo pre-emptive strike

At a meeting from 08:05 Chief of Staff Elazar proposed calling up the whole air force and four armoured divisions (100,000–120,000 troops); Dayan proposed the air force and two divisions (about 70,000). Meir chose Elazar’s plan and decided against a pre-emptive strike (Wikipedia). Elazar had wanted air strikes at 11:00 (Wikipedia). Meir told US Ambassador Kenneth Keating that morning that Israel had called up “some reserves” but not declared general mobilisation, and would not strike first (Office of the Historian).

Mobilisation takes hours. A system designed around days of warning received a few.

Why it matters: The decisions of one morning set the army’s starting position.

Zamir’s source warns of an imminent attack Warning signs

Night of 5-6 Oct 1973Mossad chief Zvi ZamirSources differ on exact times

Ashraf Marwan, a confidant of Anwar Sadat, warned Mossad that Egypt and Syria would attack, and Zamir sent word to Israel. His communique is dated 5 October and says the attack would come on Saturday “at dusk” (The Times of Israel). Accounts differ on when the message reached Meir: Zamir said the military secretary held it about ten hours. Zeira argued Marwan could be a double agent; Bar-Joseph and others disagree (Wikipedia).

The brief’s “5 October” is the communique date; the warning reached decision-makers only in the early hours or morning of 6 October.

Why it matters: The sharpest warning arrived hours, not days, before the attack.

Military Intelligence rates war “lower than low” Warning signs

5 Oct 1973General Staff meetingElazar orders a limited call-up

Transcripts from the General Staff meeting held the day before the war record Military Intelligence chief Eli Zeira putting the odds of a coordinated Egyptian-Syrian attack at “lower than low” (The Times of Israel). Elazar asked for a general reserve call-up; Dayan refused, and Elazar ordered a limited call-up from 5 October (Wikipedia). The US post-mortem found Israel “stayed relatively relaxed until the evening of October 5” (Office of the Historian).

The assessment mattered because it governed how much of the army was called up.

Why it matters: The assessment that governed the army’s readiness was a day from being tested.
Scaled timeline of warning signs and decisions from 1 to 6 October 1973 before the Yom Kippur War
Chart: the warning signs of 1 to 6 October 1973, drawn to scale. Chart by AiTimeline from FRUS, The Times of Israel and Wikipedia.

Soviet families leave Egypt and Syria Warning signs

From 3-4 Oct 1973Reported by US intelligenceUp to 1,000 dependents left Egypt

A US memo of 6 October records that “as many as 1,000 Soviet dependents have left Egypt” and that Soviet advisers were also leaving Egypt and Syria (Office of the Historian). It gave two readings: a prelude to hostilities, or a Soviet-Arab rift with advisers being pulled out under cover of a war scare. US intelligence leaned toward the second.

The start date of 3–4 October comes from CIA material AiTimeline could not open; it is given as reported.

Why it matters: A real signal that could be read two ways, and was read the safer way.

An Egyptian exercise passes with a “very low” rating Warning signs

1 Oct 1973Military Intelligence assessment

After an Egyptian drill on 1 October, Zeira rated the threat of war “very low,” according to Wikipedia’s account of his record (Wikipedia). The US post-mortem found a “cry wolf” effect: repeated earlier alarms led analysts to discount most signs of hostile intent.

Why it matters: Repeated drills dulled the response to the one that was real.

A State Department memo warns that war may come by autumn Warning signs

31 May 1973INR“Growing Risk of Egyptian Resumption of Hostilities With Israel”

The US State Department’s Bureau of Intelligence and Research, in a memo from director Ray Cline written by Roger Merrick, judged a “better than even bet” that war would occur “by autumn,” with Sadat seeking to force diplomacy rather than win outright. Other US offices disagreed (National Security Archive). The post-mortem later said analysts “were examining events as they happened” and did not revisit that reasoning (Office of the Historian).

This is an American assessment, not an Israeli one, and not every US agency agreed with it.

Why it matters: A correct strategic warning existed months ahead, but did not become policy.

The Six-Day War shapes a belief that Arab armies cannot win Warning signs

5-10 Jun 1967Sinai and the Golan Heights captured

Israel captured Sinai and the Golan Heights in the Six-Day War (Wikipedia). Brookings argues the victory reinforced Israeli intelligence’s assumption that Arab states would not start a war they could not win (Brookings), and the CIA’s own review says analysts believed Arab military inferiority would discourage an attack (CIA).

Why it matters: The 1973 surprise grew out of conclusions drawn from 1967.
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What Caused the Yom Kippur War Intelligence Failure?

The problem was interpretation and timing, not a lack of information.

1. The Concept hardened into a rule. Israeli Military Intelligence held that Egypt would not go to war without the capabilities it lacked, in particular air power, and that Syria would not act without Egypt. Brookings calls the belief that Arab states would not start a war they could not win the main reason for the failure to warn, reinforced by the 1967 victory.

2. Analysts missed the political motive. Sadat wanted a limited war to break the stalemate. The CIA’s own review says analysis did not consider that leaders might go to war for political goals even at the risk of losing, and Brookings gives the same reading of Egypt’s aims.

3. Signals could be read two ways. The Soviet departures were read by US intelligence as a Soviet-Arab rift, and repeated earlier alarms produced a “cry wolf” effect, per the US post-mortem.

4. The best warning came late and was imprecise. Marwan’s message gave “dusk” for the attack, and Zamir said it was held for about ten hours before reaching Meir. Zeira doubted Marwan’s reliability.

5. Readiness assumed days of warning. Mobilisation takes hours; a partly called-up army met a two-front attack. The decision-makers disagreed on how large a call-up to order, and Meir chose the larger one only on the morning of 6 October.

Brookings’ recommendations, including outside challenge sessions and a coherent alternative hypothesis, are a useful reminder that assumptions cannot be avoided but can be made explicit. The same pattern appears in later security failures covered by AiTimeline, such as the 26/11 attacks and the 2001 Parliament attack.

The Warning Signs, Day by Day

From the May memo to the afternoon of 6 October.

Date (1973)Indicator or decisionSource
31 MayUS State Department INR: war by autumn a “better than even bet”National Security Archive
1 OctEgyptian exercise; Zeira rates war threat “very low”Wikipedia (Zeira)
3-4 OctSoviet dependents begin leaving Egypt and Syria (as reported)US memo, 6 Oct
5 OctGeneral Staff meets; Zeira says odds “lower than low”; limited call-up beginsTimes of Israel; Wikipedia (Elazar)
5 OctZamir communique: attack on 6 Oct “at dusk”, source puts chance at 99 percentTimes of Israel
6 Oct, 08:05Meir, Dayan, Elazar meet; larger mobilisation chosen; no pre-emptive strikeWikipedia
6 Oct, 14:00Egypt and Syria attackWikipedia

Israeli Intelligence Failure vs the US Intelligence Review

Two systems, two inquiries, different shortcomings.

Israeli intelligence (Aman)US intelligence community
Core errorRelied on the Concept: Egypt would not attack without the capabilities it lacked; Syria not without EgyptDiscounted military indicators; assumed Arab military weakness after 1967 would deter war
Warnings availableZamir’s source, troop and exercise reports, Soviet departuresPlentiful, “ominous, and often accurate” material, per its own post-mortem; INR memo of 31 May
DissentZamir and Marwan’s warning did not change the assessment in timeINR (State) warned in May; NEA and other offices disagreed
Reliance on the otherHeld the primary assessmentRelied heavily on Israeli assessments passed through liaison channels
InquiryAgranat Commission: reports of 1 Apr 1974, 10 Jul 1974, 30 Jan 1975Intelligence Community Staff post-mortem, 20 Dec 1973
Outcome for peopleOfficers removed; Elazar resigned; Meir government fellNo equivalent dismissals found in the sources checked

The two failures were linked but not identical. The US post-mortem says Israeli assessments passed through liaison channels were nearly unanimous that war was unlikely, and that this reinforced American analysts’ preconceptions. That is a US finding about reliance; it is not the Agranat Commission’s account of Israel’s own process. Nor did all US agencies agree: INR had warned on 31 May.

Who Was Held Responsible, and How?

The commission’s findings on the military and political leaders, kept apart.

PersonRole in 1973What the record says
Eli ZeiraHead of Military Intelligence (Aman)Rated war “very low” on 1 Oct and “lower than low” on 5 Oct; commission recommended removing him; left the IDF in 1974
David ElazarChief of StaffReport: bears personal responsibility for the assessment and preparedness; resigned after the 1 Apr 1974 report; died 15 Apr 1976
Aryeh Shalev, Yona Bendman, David GedaliaDeputy chief and two intelligence officersRecommended for removal in the interim report
Shmuel GonenSouthern Command chiefRecommended for removal in the interim report
Moshe DayanDefence MinisterCommission said it could not rule on his responsibility and held that a minister relying on advisers bears none
Golda MeirPrime MinisterCleared of direct responsibility; announced resignation 11 Apr 1974
Zvi ZamirMossad chiefRelayed Marwan’s warning; later accused Zeira of leaking Marwan’s identity (2004)

The War and the Ceasefire, in Stages

The war began on 6 October; no single date ended it.

Date (1973)StageDetail
6 OctAttackBadr begins at 14:00; Hermon outpost falls about 17:00
8 OctCounter-attackIsraeli attempt to retake Hermon fails
12 OctFirst ceasefire offerIsrael accepts a ceasefire in place; Sadat refuses
15-16 OctCanal crossingParatroopers cross north of the Great Bitter Lake
17 OctEmbargoOAPEC announces oil embargo
22 OctResolution 338Adopted 14-0; ceasefire due 6:52 pm; Hermon retaken
23 OctResolution 339Adopted 14-0, China not voting
24-25 OctCeasefires holdIsraeli advance toward Cairo halted; war officially ends 25 Oct
11 NovKm 101 agreementFirst Egypt-Israel agreement since 1949

What Changed After the Yom Kippur War?

An inquiry with consequences. The Agranat Commission recommended removing the chief of staff, the head of Military Intelligence and other officers, and its work, along with public anger, helped end Meir’s government.

More challenge inside the system. Brookings notes that Mossad and the Foreign Ministry received added analytic responsibilities after the war; AiTimeline did not independently verify other reforms.

A new diplomatic phase. The Km 101 agreement, the January 1974 disengagement and Camp David followed. See also the Abraham Accords and the OPEC timeline for later consequences.

The Story at a Glance

Dates from the sources listed below.

DateEventDetail
5-10 Jun 1967Six-Day WarIsrael takes Sinai and the Golan
31 May 1973INR memoWar by autumn a better-than-even bet
5 Oct 1973General Staff meetingOdds “lower than low”
6 Oct 1973AttackAbout 14:00; Hermon falls about 17:00
15-16 Oct 1973Suez crossingWest-bank bridgehead
22-25 Oct 1973CeasefiresResolutions 338 and 339
11 Nov 1973Km 101 agreementEgypt and Israel
18 Nov 1973Agranat Commission set upWikipedia says 21 Nov
20 Dec 1973US post-mortemSeparate American finding
1 Apr 1974Interim reportElazar and four intelligence officers
11 Apr 1974Meir resignsSome accounts say 10 Apr
30 Jan 1975Final reportOnly the introduction public
26 Mar 1979Peace treatyAfter Camp David

The Lasting Legacy of the 1973 Surprise

The war remains a standard case study in how an intelligence system can have information and still misjudge. The lesson is not that warnings should always be believed, but that confident assumptions should be tested, alternative explanations kept alive and readiness tied to risk rather than certainty. The same logic appears in the Cold War crisis told in the Cuban Missile Crisis timeline and in the shipping lane that the war reopened, Suez and the Red Sea chokepoints. AiTimeline has no standalone stories yet on the Six-Day War or the Camp David Accords; the nearest related reading is the Middle East tensions timeline.

TermMeaningWhy it matters here
The ConceptIsraeli assumption that Egypt would not attack without certain capabilities and Syria not without EgyptShaped how warning signs were read
AmanIsrael’s military intelligence directorateHeaded by Eli Zeira in 1973
MossadIsrael’s external intelligence serviceZvi Zamir relayed the 5-6 October warning
Agranat CommissionState commission of inquiryExamined intelligence and readiness
INRUS State Department Bureau of Intelligence and ResearchWrote the 31 May 1973 warning
Pre-emptive strikeStriking first on expected attackRejected by Meir on 6 Oct
MobilisationCalling up reserve forcesTakes hours; Israel’s army relied on days of warning
DisengagementAgreed pullback of forcesEgypt: 18 Jan 1974; Syria: 31 May 1974

Who Is Who in the Story

Prime Minister

Golda Meir

Chose the larger mobilisation on 6 October and rejected a pre-emptive strike; resigned in April 1974.

Defence Minister

Moshe Dayan

Opposed a general call-up and the pre-emptive strike; the commission made no ruling on him.

Chief of Staff

David Elazar

Wanted a general call-up and air strikes; held responsible for assessment and preparedness; resigned in 1974.

Military Intelligence

Eli Zeira

Held to the Concept; rated war “lower than low” on 5 October.

Mossad chief

Zvi Zamir

Relayed the final warning from Ashraf Marwan.

Source

Ashraf Marwan

Sadat confidant; his role is disputed; died in London in 2007.

Egyptian president

Anwar Sadat

Planned a limited war to break the stalemate; later signed the 1979 treaty.

Judge

Shimon Agranat

Chief Justice who chaired the national commission of inquiry.

The Popular Story vs the Record

Popular versionWhat the record shows
Israel had no warning at allSeveral indicators existed, including a high-level warning on 5-6 October. The failure was in how they were weighed and how late the clearest one arrived
The US and Israel failed in the same wayBoth missed the attack, but the US post-mortem stressed analysts’ preconceptions and reliance on Israeli views; Israel’s failure centred on the Concept and decisions on readiness
Every US agency dismissed the riskState’s INR warned on 31 May 1973 that war by autumn was a better-than-even bet, though other offices disagreed
Marwan was certainly a loyal Israeli agentZeira thought he might be a double agent; Bar-Joseph and others disagree; a reported 2025 investigation points the other way again. The matter is disputed
The Agranat Commission blamed Golda MeirIt cleared her of direct responsibility. She resigned on 11 April 1974 after the political fallout
The ceasefire came on one dateCeasefires were adopted on 22 and 23 October, took hold on 24 and 25 October, and the Km 101 agreement followed on 11 November
Casualty totals are settledEstimates differ by source and by whose losses are counted; a single figure should not be quoted without its source
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People Also Ask

Was the Yom Kippur War an intelligence failure?
Yes: both the Agranat Commission and the 1973 US post-mortem described failures, though the shortcomings were different in Israel and the US.
Who attacked first in 1973?
Egypt and Syria attacked on 6 October 1973. Israel did not strike first.
Why is it called the Yom Kippur War?
It began on Yom Kippur, the holiest day of the Jewish calendar. Arabs often call it the October War or the Ramadan War.
Did Israel have a warning?
It had several indicators, and the clearest one arrived on 5-6 October, hours before the attack.
What was the Egyptian goal?
According to Brookings, a limited surprise attack to hold some territory briefly and prompt superpower intervention and negotiations.

Frequently Asked Questions

When did the Yom Kippur War begin?
On 6 October 1973, when Egypt and Syria attacked Israel, at about 14:00. Fighting ended in stages between 22 and 25 October 1973 under UN ceasefires.
Why was Israel surprised in 1973?
Israeli intelligence received warning indicators but judged war unlikely. A prevailing assumption, called the Concept, held that Egypt would not attack without the capabilities it lacked and Syria would not attack without Egypt. The Agranat Commission found grave failures in this assessment.
What was the Concept?
The Israeli assumption that Egypt would not start a war until it had the capabilities it needed, especially air power, and that Syria would not go to war without Egypt. Evidence that did not fit it could be explained away as exercises or defensive moves.
Was there a warning before the attack?
Yes, several. Mossad chief Zvi Zamir relayed a warning from Ashraf Marwan, dated 5 October, that an attack would come on 6 October. It reached decision-makers only hours beforehand, and it said dusk, not the actual 14:00 start.
Who was Ashraf Marwan?
An Egyptian confidant of Anwar Sadat who gave information to Mossad. He is widely identified as the source of the final warning. Whether he was a genuine source or part of an Egyptian deception is disputed; he died in London on 27 June 2007.
Who was Eli Zeira?
Eli Zeira headed Israeli Military Intelligence (Aman) in 1973. Transcripts record him rating the odds of war “lower than low” on 5 October. The Agranat Commission recommended removing him; he left the IDF in 1974.
What was the Agranat Commission?
Israel’s national inquiry, appointed on 18 November 1973 and chaired by Chief Justice Shimon Agranat. It examined the intelligence, its analysis and IDF readiness. The first report came on 1 April 1974, a second on 10 July 1974 and the final on 30 January 1975.
Who did the Agranat Commission blame?
It held Chief of Staff David Elazar personally responsible for the assessment and preparedness and recommended removing him, Zeira, three other intelligence officers and Southern Command chief Shmuel Gonen. It did not judge Defence Minister Moshe Dayan and cleared Prime Minister Golda Meir of direct responsibility.
Did Golda Meir resign because of the war?
She announced her resignation on 11 April 1974 (some accounts say 10 April), after public anger and the commission’s interim report, although the commission had cleared her of direct responsibility. Yitzhak Rabin succeeded her on 3 June 1974.
Did the US also fail to predict the war?
Yes, but its failure was separate. A December 1973 US post-mortem said collection was adequate but analysts did not perceive the growing possibility of an Arab attack. It cited preconceptions, a cry-wolf effect and reliance on Israeli assessments.
Did every US agency miss the warning?
No. The State Department’s INR wrote on 31 May 1973 that war by autumn was a better-than-even bet. Other offices disagreed, and Kissinger and Sisco were reassured by Israeli views.
Was there a pre-emptive strike?
No. Elazar wanted air strikes at about 11:00 on 6 October. Dayan refused and Meir decided against a pre-emptive strike, also telling the US ambassador that Israel would not strike first.
When did the ceasefire take effect?
Not on one date. Resolution 338 was adopted on 22 October and Resolution 339 on 23 October; a fresh ceasefire on 24 October halted Israeli progress toward Cairo and a second on 25 October officially ended the war. The Egypt-Israel Kilometre 101 agreement followed on 11 November.
What happened at Mount Hermon?
Syrian paratroopers took the Israeli observation base around 17:00 on 6 October. Israel failed to retake it on 8 October and recaptured it on 22 October.
How many people died in the war?
Estimates vary by source and by whose losses are counted. Wikipedia’s summary of cited sources gives Israeli dead as 2,521–2,800, Egyptian dead as 5,000–15,000 and Syrian dead as 3,000–3,500. AiTimeline does not endorse a single figure.
What changed in Israeli intelligence afterward?
Brookings notes that the Mossad and the Foreign Ministry received added analytic responsibilities. Its recommendations include periodic outside challenge sessions and a coherent alternative hypothesis. The details of reforms beyond that were not independently checked.
How did the war affect oil prices?
OAPEC announced an embargo on 17 October 1973 that lasted until March 1974, by which time oil had risen close to threefold.
Did the war lead to peace with Egypt?
It opened the diplomacy: the 1974 disengagement, the Camp David Accords of 17 September 1978 and the peace treaty of 26 March 1979.
What is the main lesson of the intelligence failure?
That collecting information is not enough. Assumptions need to be written down and challenged, alternative explanations kept alive, and decisions about readiness should not depend on a single confident judgment.
Where can I read the primary sources?
The US post-mortem is at history.state.gov (FRUS 1969-76 vol. XXV, doc 412), the 6 October ambassador memo is doc 99, the State Department INR memo is at the National Security Archive, and the Agranat material is at the Israeli Defence Ministry archives.

Sources and Further Reading

Related AiTimeline Stories

⚠️ Editorial Note

Last updated 22 October 2026. This page separates Israeli intelligence from the US intelligence review, and intelligence assessments from confirmed events. The war began on 6 October 1973; ceasefires were adopted on 22 and 23 October and took hold on 24–25 October. Corrections to the draft brief: Syrian forces took the Hermon outpost on 6 October, not 7 October; Marwan’s communique is dated 5 October but reached decision-makers around the early hours or morning of 6 October, and sources differ; the Agranat Commission was appointed on 18 November 1973 per the Defence Ministry archive (Wikipedia says 21 November); Meir’s resignation is dated 11 April 1974 on Wikipedia, with some accounts saying 10 April; the interim report did not rule on Dayan and cleared Meir of direct responsibility; the “1975” entry is the final report of 30 January 1975, only its introduction being public. Added: the 1 October exercise, the 5 October General Staff meeting, the 6 October mobilisation meeting, the US post-mortem, the Km 101 agreement, the OAPEC embargo and the 2018 documents release. Not independently verified: the start date of the Soviet departures (3–4 October, from CIA material we could not open); the 2025 investigation of Marwan, known to us only through Wikipedia; Zeira’s dismissal versus resignation (accounts differ); casualty totals, which vary widely by source. AiTimeline has no existing stories on the Six-Day War, the Arab-Israeli conflict as a whole or the Camp David Accords, so none are linked. This is not legal or military advice. Verify before republishing.

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