Man In The Gray Flannel Suit, The (1956) - Mystery Picnic

In a WWII flashback, married American Captain Rath (Gregory Peck) in Rome with buddy Caesar (Keenan Wynn) then with Italian girlfriend Maria (Marisa Pavan), just before shipping out for the Pacific theatre, in The Man In The Gray Flannel Suit, 1956, from the Sloan Wilson novel.