In the early part of the film, around 9 minutes in, Harrison Ford's American team and the two British soldiers are supposedly being taken to a air base at Tremoli, Italy for a night time flight into Yugoslavia during World War II. But instead of turning into the base at the gate they drive by but not before a sign identifying the base as Tremoli shared by a British RAC squadron and the 17th Corps. HQ USAF. But the USAF wasn't a separate military branch until 1947 while during the war they were still the United States Army Air Corps.