The Secret War of Harry Frigg (1968)

Five one-star generals find themselves imprisoned in Italy during WWII, creating a public relations disaster for the Allies. Unable to cooperate, they struggle to devise an escape plan. Enter Harry Frigg, a crafty private notorious for his repeated escapes. When he is unexpectedly promoted to Major General while also being captured, he is tasked with the impossible mission of liberating the generals. Eager to take on the challenge, Harry's plans become complicated when he encounters a captivating countess, leading to unexpected complications in his daring escape strategy.