 Complete the following phrase:  La Grande Illusion is a war film without any depiction of battle. Instead, the prisoner of war camp setting is used as a space in which soldiers of many nations have a common experience. Renoir portrays war as a futile exercise. For instance, Elsa, the German widow, shows photos to Maréchal and Rosenthal of her husband and her brothers who were killed, respectively, at the battles of Verdun, 