In 1923 an agreement between the United Kingdom and France set the border between the British Mandate of Palestine and the French Mandate of Syria. The British gave the southern Golan Heights to the French in return for the northern Jordan Valley. The border was drawn again so that both sides of the Jordan river and the whole of the Sea of Galilee, including a 10-meter wide strip along the northeastern shore, were made a part of Palestine . The 1947 UN Partition Plan put this area inside the Jewish state.