The Casablanca Conference (codenamed SYMBOL) or Anfa Conference was held in Casablanca, French Morocco, from January 14 to 24, 1943, to plan the Allied European strategy for the next phase of World War II. The main discusssions were between US President Franklin Roosevelt (with his military staff) and British Prime Minister Winston Churchill (with his staff). Stalin could not attend. Key decisions included a commitment to demand Axis powers' unconditional surrender; plans for an invasion of Sicily and Italy before the main invasion of France; an intensified strategic bombing campaign against Germany; and approval of a US Navy plan to advance on Japan through the central Pacific and the Philippines. The last item authorized the island-hopping campaign in the Pacific, which shortened the war. Of all the decisions made, the most important was the invasion of Sicily, which Churchill pushed for in part to divert American attention from opening a second front in France in 1943, a move that he feared would result in very high Allied casualties and not be possible until 1944.

Also attending were the sovereign of Morocco, Sultan Muhammad V, and representing the Free French forces, Generals Charles de Gaulle and Henri Giraud, but they played minor roles and were not part of the military planning. Soviet dictator Joseph Stalin declined to attend, citing the ongoing Battle of Stalingrad as requiring his presence in Moscow.

Roosevelt and Churchill issued the public Casablanca Declaration, with its most provocative goal, "unconditional surrender". That doctrine came to represent the unified voice of implacable Allied will and the determination that the Axis powers would be fought to their ultimate defeat.