Final answer:
The Balfour Declaration promised to support a Jewish homeland in Palestine.
Step-by-step explanation:
The Balfour Declaration, issued in 1917, promised to support a Jewish homeland in Palestine.
It was a statement made by British foreign secretary Alfred Balfour, expressing the British government's favor for the establishment of a national home for the Jewish people in Palestine.
This declaration marked the achievement of the Zionist goal of creating a Jewish state in their ancestral homeland.
However, the implementation of this promise caused tensions and conflicts between the Jewish and Arab populations in Palestine.