Dragon Ball Time Breaker Mask

The Dark Empire is an army of demons commanded by the Dark King Mechikabura, an ancient demon who founded the army.

After Mechikabura was sealed away in the Crack of Time, Towa was left in control of the group, with it being renamed as the Time Breakers, early on referred to as the "Pale Man's Army" by the Time Patrol (due to believing Mira was the leader).