Six Day War 

These acts are aggression. Why did Egypt kick out UN forces from the border? Why did Egypt increase military activity along the Egyptian-Israeli border? Why did Egypt create a blockade? Egypt clearly wanted to seek the destruction of Israel as it did during the 1948 Arab-Israeli War. Had Egypt not made these hostile moves, Israel would have no reason to strike. Israel is a small country and when its enemies make hostile moves that may endanger its safety, Israel must move quickly. On a further note, no Egyptian ruler has ever offered peace towards Israel. Israel has always offered peace to Egypt. As a matter of fact, in 1979 Israel gave up the Sinai Peninsula in exchange for peace with Egypt.