Following Israel's victory in the six-day war, the war of attrition at the Suez Canal began. The Egyptians began firing in provocation against the Israeli forces posted on the eastern part of the canal. Haim Bar Lev, Israel's chief of staff, suggested that Israel construct a border line to protect its southern border. A wall of sand and earth raised along almost the entire length of the Suez Canal would both allow observation of Egyptian forces and conceal the movements of Israeli troops on the eastern side. This line, named after the chief of staff Haim Bar Lev, became known as the Bar Lev Line. It included at least thirty strong points stretching over almost 200 kilometers.