The Signal Men were used by Peraxxus to fight the Justice League International.
History
The Signal Masters
Main article: Justice League International: The Signal Masters
The Signal Men are giant robots created as advance scouts for an alien race. Their function was to track the progress of a civilization and then summon their masters when it had grown to a certain point. When their masters died, the Signal Men were left dormant underground on a variety of worlds. Peraxxus discovers them and becomes their new master, using them to destroy planets and sell them for scrap.[1] Eventually four Signal Men wake up on Earth.[2] They begin wreaking havoc on the planet while Peraxxus is alerted.[3] Justice League International investigates their threat and tries unsuccessfully to fight the robots.[4] They are able to defeat Peraxxus, and Rocket Red reprograms the Signal Men to stop destroying Earth.[5]
Notes
- The masters of the Signal Men have not been explained or revealed.