1917 CE: “BALFOUR DECLARATION OF 1917”

Letter from the UK’s Foreign Secretary Arthur Balfour to Lord Rothschild, who was seen as a representative of the Jewish people…
“… The British government viewed with favor the establishment in Palestine of a national home for the Jewish people…”

…but Britain will backtrack—at the moment of maximum Jewish vulnerability—at the beginning of WWII.
(See 1939 CE: MACDONALD WHITE PAPER)

(Not to be confused with Balfour Declaration of 1926 relating to British Commonwealth dominions)