After the British mandate of Palestine by the League of Nations in 1922, Britain started to allow Jews to immigrate into Palestine. This caused major problems with the Arabs already living in the region and initiated what would be the lingering problem in the Middle East for the entire 20th century. After much fighting between the Jews and Arabs, Britain decided to refuse any more immigration of Jews into Palestine. The fighting still continued and in 1947, Britain declared the mandate unworkable and handed the problem over to the United Nations. The nation of Israel was established on May 14, 1948 by the Jews and Arab armies immediately attacked starting the first Arab-Israeli War. The Israeli's were victorious and gained more Arab territory causing 780,000 Palestinians to become refugees. Three other wars between these two feuding groups occurred between 1960 and 1975, including the Yom Kippur War. These wars were about ownership of territory, basically the regions called the West Bank and the Gaza Strip. Ultimately the Israelis held on and still today have a nation they can call their own while Palestinian refugees, who were able to obtain the Gaza Strip and the West Bank, are still angered by the stripping of their homeland they once had called Palestine and terrorism is still apparent in this ongoing dispute.