The Yom Kippur War, also known as the 1973 Arab–Israeli War, the fourth Arab–Israeli War, the October War, or the Ramadan War, was fought from 6 to 25 October 1973 between Israel and a coalition of Arab states led by Egypt and Syria. Most of the fighting occurred in the Sinai Peninsula and Golan Heights, territories occupied by Israel in 1967. Some combat also took place in mainland Egypt and northern Israel.
The war started on 6 October 1973, when the Arab coalition launched a surprise attack across their respective frontiers during the Jewish holy day of Yom Kippur, which coincided with the 10th day of Ramadan. The United States and Soviet Union engaged in massive resupply efforts for their allies (Israel and the Arab states, respectively), which heightened tensions between the two superpowers.