What was the codename for Egypt's surprise attack in the Yom Kippur War?

Egypt’s surprise attack in the Yom Kippur War was codenamed Operation Badr.

Launched on October 6, 1973, Operation Badr sent Egyptian forces across the Suez Canal into the Sinai Peninsula, which Israel had occupied since the Six-Day War. Egyptian troops used artillery, assault boats, prefabricated bridges, and high-pressure water hoses to breach the sand embankments protecting Israel's Bar-Lev Line.

The opening assault achieved major Egyptian objectives. Egyptian forces captured or bypassed many Israeli strongpoints and established bridgeheads on the canal's eastern bank. The attack was coordinated with Syria's offensive on the Golan Heights and deliberately began on Yom Kippur, coinciding with the Islamic holy month of Ramadan.

“Badr” refers to the early Islamic Battle of Badr, an important victory associated with the Prophet Muhammad. The operation is sometimes confused with Israel's later counteroffensive, Operation Gazelle, which crossed the canal in the opposite direction. Egypt's initial success ultimately led to a wider Israeli counterattack and intense diplomatic intervention.