 Khalidi based his thesis on Plan Dalet, a plan devised by the Haganah high command in March 1948, which stipulated, among other things that if Palestinians in villages controlled by the Jewish troops resist, they should be expelled (Khalidi, 1961).Plan Dalet was aimed to establish Jewish sovereignty over the land allocated to the Jews by the United Nations (Resolution 181), and to prepare the ground toward the expected invasion of Palestine by Arab states after the imminent establishment of the state of Israel.In addition, it was introduced while Jewish–Palestinian fighting was already underway and while thousands of Palestinians had already fled.