Explain in 3-4 sentences Balfour Declaration. also include the year.

The Balfour Declaration was a public statement issued by the British government on November 2, 1917, during World War I. It expressed support for the establishment of a "national home for the Jewish people" in Palestine, then under Ottoman rule. The declaration played a significant role in shaping the eventual establishment of the state of Israel in 1948. It has been a source of controversy and conflict between Israelis and Palestinians ever since.