These initially took the form of limited artillery duels and small-scale incursions into Sinai, but by 1969, the Egyptian Army judged itself prepared for larger-scale operations. On March 8, 1969, Nasser proclaimed the official launch of the War of Attrition, characterized by large-scale shelling along the Suez Canal, extensive aerial warfare and commando raids. Hostilities continued until August 1970 and ended with a ceasefire, the frontiers remaining the same as when the war began, with no real commitment to serious peace negotiations.