Revolt of the Zombies (1936)

The story is set in Cambodia in the years following WWI. An evil count has come into possession of the secret methods by which men can be transformed into walking zombies and uses these unholy powers to create a race of slave laborers. An expedition is sent to the ruins of Angkor Wat, in hopes of ending the count's activities once and for all. Unfortunately, one of the members of the expedition has his own agenda.