Days of Glory is a 1944 American film, directed by Jacques Tourneur, which tells the story of a group of Soviet guerrillas fighting back during the 1941 Nazi invasion of Russia. It marked the film debut of Tamara Toumanova and Gregory Peck, as well as most of the other principal actors. It was also the first film produced by screen writer Casey Robinson, who in early January 1943 had been contracted by RKO Radio Pictures to write and produce the film under the working title This Is Russia. Robinson and Toumanova married in 1944 and divorced in 1955. The film included the last screen appearance of actor Erford Gage, who subsequently entered the U.S. Army and was killed in action in 1945.