They Were Not Divided is a 1950 British war film, which depicted the Guards Armoured Division in Second World War Europe. It was written and directed by Terence Young, a former Guards officer who served in the campaigns depicted in the film.

The cast consists of little known professional actors, and real soldiers with speaking parts. The male leads are Edward Underdown and Ralph Clanton with Michael Trubshawe. Two supporting actors who became famous later on are Christopher Lee as a tank commander and Desmond Llewelyn as a tank gunner. Anthony Dawson later made appearances in a large number of Terence Young's films.

Sections of the action are interspersed with documentary footage from the war creating the "scene-setting".