Today in history: 5 June 1967
After a period of high tension, the Six-Day War began with Israel launching preemptive surprise bombing raids against Egyptian air-fields in the Sinai. Within six days, Israel had won a decisive land war. Israeli forces had taken effective control of the Gaza Strip and the Sinai Peninsula from Egypt, the West Bank and East Jerusalem from Jordan, and the Golan Heights from Syria.
United Nations Security Council Resolution 242 (S/RES/242) was adopted unanimously by the UN Security Council on November 22, 1967, in the aftermath of the this war. It was adopted under Chapter VI of the United Nations Charter. The resolution was sponsored by British ambassador to the UN, Hugh Foot, so-called Lord Caradon. In the Preamble to this resolution, the inadmissibility of the acquisition of territory by war is established.
It follows that the Occupied Palestinian Territories which comprise the West Bank, including East Jerusalem, and the Gaza Strip cannot be claimed by Israel and this includes all land on which the Israelis have built settlements as well as land appropriated by the Israeli Wall.