During World War I, the British government issued the Balfour Declaration in 1917, supporting the “establishment in Palestine of a national home for the Jewish people.” Palestine became a British Mandate after the war and British officials simultaneously encouraged the national aspirations of the Arab majority in Palestine for eventual self-determination, insisting that its promises to Jews and Arabs did not conflict. Jews immigrated to Palestine in ever greater numbers during the Mandate period, and tension between Arabs and Jews and between each group and the British increased, leading to periodic clashes. Following World War II, the plight of Jewish survivors of the Holocaust gave the demand for a Jewish home added poignancy and urgency, while Arabs across the Middle East simultaneously demanded self-determination and independence from European colonial powers.
In 1947, the United Nations General Assembly developed a partition plan (Resolution 181) to divide Palestine into Jewish and Arab states, proposing U.N. trusteeship for Jerusalem and some surrounding areas. The leadership of the Jewish Yishuv (or polity) welcomed the plan because of the legitimacy they asserted that it conferred on the Jews’ claims in Palestine despite their small numbers, while the Palestinian Arab leadership and the League of Arab States (Arab League) rejected the plan, insisting both that the specific partition proposed and the entire concept of partition were unfair given Palestine’s Arab majority.
After several months of civil conflict between Jews and Arabs, Britain officially ended its Mandate on May 14, 1948, at which point the state of Israel proclaimed its independence and was immediately invaded by Arab armies. During and after the conflict, roughly 700,000 Palestinians were driven or fled from their homes, an occurrence Palestinians call the nakba (“catastrophe”).1 Many became internationally designated refugees after ending up either in areas of Mandate-era Palestine controlled by Jordan (the West Bank) or Egypt (the Gaza Strip), or in nearby Arab states. Palestinians remaining in Israel became Israeli citizens.
The conflict ended with armistice agreements between Israel and its neighboring Arab states: Egypt, Jordan, Lebanon, and Syria. The territory controlled by Israel within these 1949-1950 armistice lines is roughly the size of New Jersey. Israel has engaged in further armed conflict with some or all of its neighbors on a number of occasions since then -- most notably in 1956, 1967, 1973, and 1982. Since the 1950s, Israel has also dealt with the threat of Palestinian guerrilla or terrorist attacks.
Since Israel’s founding in 1948, successive U.S. Presidents and many Members of Congress have demonstrated a commitment to Israel’s security and to close U.S.-Israel cooperation. Perceptions of shared democratic values and religious affinities have contributed to strong bilateral ties. The question of Israel’s security regularly influences U.S. policy considerations regarding the Middle East, and Congress provides active oversight of executive branch dealings with Israel and other actors in the region. Israel is a leading recipient of U.S. foreign aid and a frequent purchaser of major U.S. weapons systems. By law, U.S. arms sales cannot adversely affect Israel’s “qualitative military edge” over other countries in its region. (
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