Mars & the Duke of Deception

In the Golden Age, the Roman God Mars ruled from the planet bearing his namesake, where he gathered the souls of dead men to serve as eternal slaves to his kingdom. Under Mars were three commanders, Lord Conquest, the Earl of Greed, and the Duke of Deception (along with General Destruction and Lya.) Mars and his lieutenants often deployed forces from the planet Mars against their sworn enemies, the Amazons, and their greatest champion, Wonder Woman. Initially, these "Martians" appeared to be Caucasian humans, perhaps related to those enslaved souls, but later, native Martians were clearly deployed. 

At one point, Duke Deception overthrew Mars to rule their planet, and later commanded a fiefdom over Yellow Martians, whose form he assumed to lead them in a combined invasion force alongside armies from Saturn and Jupiter. This was after Deception had gathered representatives from planets throughout the Solar System in a bid to join together to invade Earth, but they were put off when Princess Diana made an impressive demonstration of potential resistance in "The Olympics of Terror." Later still, after an unexplained separation from his prior army (which may have involved the machinations of Morpheus,) the Imperator of Illusions assumed a green-skinned form, and was surprised to make the acquaintance of actual Green Martians. For a sprawling arena of natives, the Master of Matter tasked Wonder Woman in the Martian Olympics of the Doomed, but the Amazing Amazon bested him in the crooked competition. In revenge, the Green Martians destroyed the Earth, but with the help of a Jovian, Princess Diana traveled back through to prevent the destruction before it began.

Mars himself pitted against Wonder Woman the Crimson Centipede, a powerful green-skinned being, and a Martian creation bearing roughly sixteen arms and legs. Meanwhile, the Duke of Deception disfigured Wonder Girl, and tried to use her as bait for the Wonder Family to be cut down by a Martian fleet, but was thwarted. After a final invasion attempt on Paradise Island with Martian saucers disguised as an Amazonian Swan Fleet, the Duke of Deception was commanded by the Lasso of Truth to return to the Red Planet, from which the Martian incarnation of the Imperator of Illusions never returned. This final return took place before the seeming destruction of Mars in the inferno of The Blue Flame.