Ka cika wannan magana: Ko kafin Amirka ta shiga yaƙin, mijinta ya goyi bayan kāre Biritaniya. Fim dinsa na farko da ya lashe Oscar, "Mrs. Miniver" (1942), ya kasance hoto ne mai tausayi na dangin Ingilishi da ke jurewa yakin Burtaniya. Bayan kammala wannan fim din, ya shiga cikin Rundunar Sojan Sama ta Amurka kuma ya tashi a cikin manufa a Turai don yin shirye-shirye game da su. A cikin
A cikin shirin Academy Awards na 1943, Margaret ya karɓa, a cikin rashin mijinta, lambar yabo ta Academy don Kyauta mafi kyau a "Mrs. Miniver".