Shows America's shift in opinion towards the war effort - Pearl Harbour caused America to join the war as they initially didn't want to due to recovering from the Great Depression
93% people didn't want to join the war before Pearl Harbour, 91% wanted to join after
Hays code is firmly in place
Power in international alliances, as promoted by the film - this opposes the Nazi ideology as Café Americain is seen as a safe haven/utopia
Vichy agreement between France and Germany
Film reflects America's (Rick) shift from isolationist to interventionalist