In the absence of peace treaties between all the parties at war, Israel has under all circumstances the right to maintain control of the captured territories. Their ultimate disposition should be a result of peace treaties, and not a condition for them. Even so, Israel asserts that: The 1956 war was caused by a pattern of Egyptian belligerence against Israel, culminating with the nationalization of the Suez Canal and the blockage of the canal for Israeli traffic in violation of the Convention of Constantinople and other relevant treaties, in their view a clear casus belli (i.e., an act justifying war) The 1967 war was similarly caused by the closing of the Straits of Tiran, the rejection of UN forces in the Sinai desert, and the redeployment of Egyptian forces.