They Died With Their Boots On (1941)

In director Raoul Walsh's historically-inaccurate but rousing western/adventure biopic:

• the tale of the life of the infamous General George Armstrong Custer (Errol Flynn) from his time at West Point to the climactic action scene of his final conflict against Chief Sitting Bull at the Battle of the Little Big Horn massacre
• previously, the scene of his heart-rending farewell goodbye to his wife Elizabeth "Libby" Bacon (Olivia de Havilland) who sensed disaster and then collapsed to the floor when he left