Pyle covered the 1st Infantry Division, including the 18th Infantry, in Tunisia from January to May 1943, and wrote a column on the American defeat at Kasserine Pass. He also landed with the 1st Division during the invasion of Sicily in July 1943. However, after the Sicilian campaign, which is mentioned but not portrayed in the film, the 18th Infantry moved to England to prepare for the Allied invasion of France, while the film's "Company C" is said to have made a landing under fire at Salerno.