Even before the United States entered the war, her husband was an outspoken advocate for the defense of Great Britain. His first Oscar-winning film, "Mrs. Miniver" (1942), was a sympathetic portrayal of an English family enduring the Battle of Britain. After completing that film, he enlisted in the United States Army Air Corps and flew in missions over Europe in order to make documentaries about them. At the 1943 Academy Awards program, Margaret accepted, in her husband's absence, his Academy Award for Best Director in "Mrs. Miniver."