Following the Yom Kippur War between Egypt and Israel in 1973, an international agreement was reached in October 1973 to provide measures to reopen the Suez Canal after its closure during the 1967 Six-Day War. The U.S.-led clearing effort undertaken in 1974 consisted of three operations: the sweeping of mines in the Suez Canal by naval units from the United States, the United Kingdom and France (Operation Nimbus Star), the provision of training and advisory assistance for land and water explosive ordnance clearance for Egyptian forces (Operation Nimbus Moon) and the removal and salvage of wrecks from the Canal (Operation Nimrod Spar).