Original sentence: After expelling UNEF peacekeepers from the Sinai Peninsula and establishing a military presence at Sharm el-Sheikh, Egypt blockaded the straits, prompting Israel to cite its casus belli in opening hostilities against Egypt
Edited sentence: After expelling UNEF peacekeepers from the Sinai Peninsula and establishing a military presence at Sharm el-Sheikh, Egypt blockaded the straits, which Israel argued contravened  international law.At the time Egypt also prohibited any ships trafficking with Israel from the Suez Canal.Syria (which had  been supporting Palestinian  infiltration into Israel) and Jordan both attacked soon after.The blockade was the major factor in the Israeli strike against Egypt's airforce.Through the UN, Israel warned Jordan to not attack, but Jordan refused, and Israel retaliated, invading and occupying the West Bank and East Jerusalem, which Jordan had annexed following the 1948 Arab-Israeli War