their place. Israel protested Nasser's order to close the Straits of Tiran to Israeli trade on 21 May, the same year. This halted Israeli shipping between the port of Eilat and the Red Sea. After the 1967 Six-Day War, Israeli forces occupied the Sinai Peninsula, including the entire east bank of the Suez Canal. In the following years the tensions between Egypt and Israel intensified and from March 1969 until August 1970, a war of attrition took place as the then Egyptian president, Gamal Abdel Nasser, tried to retake the territories occupied by Israel during the conflict. The fighting ceased after the death of Nasser in 1970. After this conflict there were no changes in the distribution of territory, but the underlying tensions persisted. Unwilling to allow the Israelis to use the canal, Egypt immediately imposed a blockade which closed the canal to all shipping immediately after the beginning of the Six-Day War. The canal remained blocked for eight years. There was no anticipation of this event and consequently fifteen cargo ships, known as the "Yellow Fleet", were trapped in the canal, and remained there until its reopening in 1975. On 6 October 1973, during the Yom Kippur War, the canal was the scene of the Operation Badr, in which the Egyptian military crossed the Suez Canal into Israeli-occupied Sinai Peninsula. Much wreckage from this conflict remains visible along the canal's edges. Arab oil exporters, sympathetic to Egypt, pushed OPEC to raise the price of crude oil by around 17 percent and eventually imposed an embargo against the United States and other Israeli allies. Mine clearing operations (1974–75) After the Yom Kippur War, the United States initiated Operation Nimbus Moon. The amphibious assault ship USS Inchon (LPH-12) was sent to the Canal, carrying 12 RH-53D minesweeping helicopters of Helicopter Mine Countermeasures Squadron 12. These partly cleared the canal between May and December 1974. She was relieved by the LST USS Barnstable County (LST1197). The British Royal Navy initiated Operation Rheostat and Task Group 65.2 provided for Operation Rheostat One (six months in 1974), the minehunters HMS Maxton, HMS Bossington, and HMS Wilton, the Fleet Clearance Diving Team (FCDT) and HMS Abdiel, a practice minelayer/MCMV support ship; and for Operation Rheostat Two (six months in 1975) the minehunters HMS Hubberston and HMS Sheraton, and HMS Abdiel. When the Canal Clearance Operations were completed, the canal and its lakes were considered 99%