The failure of the Arab nations to acknowledge the right for Israel to exist in 1948.


Since the Arab nations did NOT agree to the borders of the 1948 partition, the LAST set of Internationally recognized borders are the 1923 ones, between the Arab Moslim Homeland of TransJordan, and the Jewish Homeland of Palestine.

http://www.unitedjerusalem.com/Graphics/Maps/PartitionforTransJordan.asp