Question: What letter is regarded as the precursor to a public statement issued by the British government during World War I announcing support for the establishment of a "national home for the Jewish people" in Palestine?

<P0-S0> The Cambon letter is a letter written on 4 June 1917 by Jules Cambon, head of the political section of the French foreign ministry, to Zionist diplomat Nahum Sokolow. <P0-S1>  The letter expressed French Government sympathy for Jewish colonization in Palestine. <P0-S2>  It is regarded as a politically essential precursor of the Balfour Declaration. <SEP> <P1-S0> A homeland for the Jewish people is an idea rooted in Jewish culture and religion. <P1-S1>  In the early 19th century, the Napoleonic Wars led to the idea of Jewish emancipation. <P1-S2>  This unleashed a number of religious and secular cultural streams and political philosophies among the Jews in Europe, covering everything from Marxism to Chassidism. <P1-S3>  Among these movements was Zionism as promoted by Theodore Herzl. <P1-S4>  In the late 19th century, Herzl set out his vision of a Jewish state and homeland for the Jewish people in his book "Der Judenstaat". <P1-S5>  Herzl was later hailed by the Zionist political parties as the founding father of the State of Israel. <P1-S6>  In the Balfour Declaration of 1917, the United Kingdom became the first world power to endorse the establishment in Palestine of a "national home for the Jewish people." <P1-S7>  The British government confirmed this commitment by accepting the British Mandate for Palestine in 1922 (along with their colonial control of the Pirate Coast, Southern Coast of Persia, Iraq and from 1922 a separate area called Transjordan, all of the Middle-Eastern territory except the French territory). <P1-S8>  The European powers mandated the creation of a Jewish homeland at the San Remo conference of 19–26 April 1920. <P1-S9>  In 1948, the State of Israel was established. <SEP> <P2-S0> The Churchill White Paper of 3 June 1922, officially Correspondence with the Palestine Arab Delegation and the Zionist Organisation was drafted at request of Sir Winston Churchill in response to the 1921 Jaffa Riots which began with intra-Jewish violence escalated into Arab attacks against Jews. <P2-S1>  Although the attacks were primarily facilitated by the Arabs, the British White Paper concluded that the violence was sparked by resentment towards Jewish Zionists and the perceived favoritism towards them by the British, as well as Arab fears of subjugation. <P2-S2>  While maintaining Britain's commitment to the Balfour declaration and its promise of a Jewish National Home in Palestine, "internationally guaranteed" and "recognized to rest upon ancient historic connection," the paper emphasized that the establishment of a Jewish National Home would not impose a Jewish nationality on the Arab inhabitants of Palestine, and "the status of all citizens of Palestine in the eyes of the law shall be Palestinian". <P2-S3>  To <SEP> <P3-S0>  It read: <P3-S1> The Balfour Declaration was a public statement issued by the British government during World War I announcing support for the establishment of a "national home for the Jewish people" in Palestine, then an Ottoman region with a minority Jewish population.