Through this letter, which became known as the Balfour Declaration, British government policy officially endorsed Zionism. After World War I, the United Kingdom was given a mandate for Palestine, which it had conquered from the Ottomans during the war. In 1937 the Peel Commission suggested partitioning Mandate Palestine into an Arab state and a Jewish state, though the proposal was rejected as unworkable by the government and was at least partially to blame for the renewal of the 1936–39 Arab revolt.