Planning for the invasion of Sicily, code-named HUSKY, had begun well before North Africa was cleared. From beginning to end, the campaign would reveal the difficulties of conducting a coalition war, as national rivalries precluded unified command in fact as well as in name. The conquest of Sicily would give the Allies undisputed mastery of the Mediterranean and might even push Italy out of the war. These goals were accomplished but, much to the dismay of General Marshall and other American military leaders, the occupation of Sicily also strengthened the case for invading Italy at the expense of the buildup for a cross-channel invasion of France. The Italian campaign subsequently became one of the most criticized of the war.