War Lord

The War Lords are an intelligent spacefaring species of humanoids, externally indistinguishable from Humans. They have access to mind-control technology and once achieved time travel capability by allying themselves with the rogue Time Lord known as the War Chief.

History
Intending to obtain a race of soldiers to conquer the galaxy, the War Lords determined that the Human people of Earth were an ideal choice. They abducted army legions from several civilizations and cultures throughout the planet's history and brought them to a battlefield planet to fight each other, intending to find out which army was the strongest. This plan was foiled by the Doctor, who informed the Time Lords about the War Lords' activities and asked for help to return the hundreds of Humans back to their proper time periods. The War Lords were then punished by having their home planet locked within a force field, while the Doctor was himself put on trial for his reckless behavior and eventually forced to regenerate and be exiled to Earth in the 1970s.

Appearances

 * Doctor Who season 6 - The War Games (1969)