The first part of this film sees Frank Sinatra struggling against an Italian camp commandant and the British commander in charge of most of the POWs. The second half of the film see Sinatra's character leading the POWs out of the camp to the freedom of Switzerland. Identify this 1965 film which had a cast that included Adolfo Celi, Trevor Howard, and James Brolin about a POW prison break that Spoiler Alert ends with Sinatra's character dying in order to avoid a sequel.
Von Ryan's Express