Von Ryan's Express

When U.S. combat pilot Col. Joseph Ryan (Frank Sinatra) is captured by Nazis, he does what it takes to survive prison camp, including, by all appearances, befriend the enemy. Hence, his prison mates give Ryan the insulting nickname Von Ryan. But in time, Ryan takes over from the commanding British officer (Trevor Howard) and masterminds commandeering a train to Switzerland with the Nazis in hot pursuit. (official distributor synopsis)