Battles & Wars › Cold War › Arab–Israeli wars
Yom Kippur War (October War)
October 6–25, 1973· War· Middle East & Africa
Well documentedSolid records, physical evidence or scientific consensus.
A surprise attack by Egypt and Syria on Israel on Yom Kippur, the holiest Jewish day, in 1973, aimed at regaining land lost in 1967.
See it on the Battles & Wars map →What happened
On October 6, 1973, Egyptian forces crossed the Suez Canal and broke Israel's Bar-Lev defense line while Syria attacked on the Golan Heights. Israel, caught unprepared, suffered heavy early losses. The US airlifted arms to Israel and the Soviet Union supplied the Arab side. Israel counterattacked, crossed the canal and encircled an Egyptian army before a ceasefire held on October 25. Arab oil producers cut output and embargoed the US and others.
Why it matters
It restored Egyptian pride, opening the way to the 1978 Camp David Accords and 1979 Egypt–Israel peace treaty; the oil embargo roughly quadrupled oil prices.
How we know
Israel's Agranat Commission inquiry, declassified US, Israeli and Egyptian documents, and memoirs of leaders such as Golda Meir, Henry Kissinger and Anwar Sadat.
Still debated
Why Israeli intelligence missed clear warnings, including one from Egyptian insider Ashraf Marwan, and whether Marwan was a true spy or a double agent, remain debated.
Connections (3)
▸Six-Day War led to Yom Kippur War (October War)Well documented
The connection
Egypt and Syria wanted back the Sinai and Golan Heights lost in 1967. A grinding 'War of Attrition' along the Suez Canal (1967–70) and failed diplomacy convinced Egypt's Anwar Sadat that a limited war was needed to force negotiations. Israel's confidence after 1967 led it to underestimate the threat.
When and how
Suez Canal and Golan Heights, 1967–1973; Sadat and Syria's Hafez al-Assad planned the joint attack in 1973.
How we know
Sadat's own statements and Egyptian planning documents state the aim; Israel's Agranat Commission criticized pre-war overconfidence.
Debates and open questions
Whether Israel or the US missed real chances for a deal before 1973, such as Sadat's 1971 peace overtures, is debated.
▸Yom Kippur War (October War) triggered a US nuclear alert during Cold WarWell documented
The connection
The US resupplied Israel, the Soviet Union the Arabs. When Israel encircled an Egyptian army, Moscow hinted it might send troops; the US raised its nuclear alert to DEFCON 3 on October 24–25. The crisis passed, and Kissinger's diplomacy afterward pulled Egypt out of the Soviet camp toward the US.
When and how
October 1973, Washington and Moscow, with Henry Kissinger and Leonid Brezhnev; Egypt moved toward the US through 1974–1979.
How we know
Declassified US records and Brezhnev's message to Nixon document the threat and the alert; Egypt's realignment is well recorded.
Debates and open questions
How serious Brezhnev's threat was, and whether the US alert was necessary or an overreaction during the Watergate crisis, is debated.
▸Yom Kippur War (October War) was the last major interstate round of Arab–Israeli warsWell documented
The connection
Israel won militarily, but early Arab successes restored Egypt's confidence and shook Israel's. Sadat could negotiate from strength: his 1977 Jerusalem visit, the 1978 Camp David Accords and the 1979 peace treaty returned Sinai to Egypt. Jordan made peace in 1994, and no full-scale war between Israel and Arab national armies followed.
When and how
Camp David, Maryland, September 1978, with Sadat, Israel's Menachem Begin and US President Jimmy Carter; treaty signed in Washington on March 26, 1979.
How we know
The peace treaties are documented; since 1973 conflicts have mainly involved Lebanon, Palestinian groups and militias rather than Arab national armies.
Debates and open questions
The 1982 Lebanon War included Israeli–Syrian battles, so whether 1973 was truly the last interstate round depends on definitions.