Operation Raviv (Hebrew: רביב‎, Drizzle), also known as the Ten-Hour War, was a mounted raid conducted by the Israeli Defence Forces (IDF) on Egypt's Red Sea coast during the War of Attrition. Taking place on September 9, 1969, Raviv was the sole major ground offensive undertaken by the IDF against Egypt throughout the war. The operation saw Israeli forces masquerading as Egyptian troops and using captured Arab armor.