Ryan's Daughter (1970)

David Lean's epic tale of forbidden love, set during the Irish Rebellion of 1916 tells the story of Charles Shaughnessy (Robert Mitchum), a kind and gentle widower, who falls in love with and marries the much younger Rosy (Sarah Miles). On her wedding night, however, Rosy finds that her new husband does not make her romantic dreams come true. When a handsome young Major arrives to take over England's occupying forces, he and Rosy feel an immediate sexual attraction to each other. Unable to resist temptation despite the dangers, the two begin a passionate affair.But when someone betrays the Irish rebels to the British authorities, the whole town suspects Rosy. They're determined to make her pay... and it doesn't matter whether or not she's innocent.