Thunder in the East (1934)

The Battle is a 1934 Franco-British co-production English language drama film directed by Nicolas Farkas and Viktor Tourjansky, and starring Charles Boyer, Merle Oberon and John Loder. It was adapted from a novel by Claude Farrère. In 1904 during the Russo-Japanese War, a Japanese naval officer gets his wife to seduce a British atachee in order to gain secrets from him. Things begin to go wrong when she instead falls in love with him.