Plan Dalet, or Plan D, (Hebrew: תוכנית ד'‎, Tokhnit dalet) was a plan worked out by the Haganah, a Jewish paramilitary group and the forerunner of the Israel Defense Forces, in Palestine in autumn 1947 to spring 1948. Its purpose is much debated. According to Yoav Gelber and Benny Morris, it was a contingency plan for defending a nascent Jewish state from invasion. According to other historians such as Walid Khalidi and Ilan Pappe, its purpose was to conquer as much of Palestine, and to expel as many Palestinians, as possible.