Casablanca Conference, Jan. 14-24, 1943, World War II meeting of U.S. President Franklin Delano Roosevelt and British Prime Minister Winston Churchill at Casablanca, French Morocco. A joint declaration pledged that the war would end only with the unconditional surrender of the Axis states. No agreement was reached on the claims for leadership of the rival French generals, Henri H. Giraud and Charles de Gaulle, who also attended the conference.