http://www.palestinefacts.org/pf_ww1_british_mandate.php
http://www.unitedjerusalem.com/Graphics/Maps/PartitionforTransJordan.asp

"In 1923 the British "chopped off" 75% of the proposed Jewish Palestinian homeland to form an Arab Palestinian Nation of "Trans-Jordan," meaning "across the Jordan River." The Palestinian Arabs now had THEIR homeland... the remaining 25% of the original Palestinian territory (west of the Jordan River) was to be the Jewish Palestinian homeland."