Mars (character)

Ares is a god of war in Roman mythology.

Biography
At some point Greek mythology established that Ares was a god of war. Roman mythology then based Mars on Ares.

Time-traveling in 49 BC Jefferson Jackson impersonated Ares while attacking Julius Caesar's forces, while Martin Stein corrected him that in Roman mythology Mars was a god of war.

On Earth Thirty-Eight at an unknown point the fourth planet from the Sun was named after Mars.

Behind the scenes

 * In ancient Roman religion and mythology, Mars was the god of war and an agricultural guardian, Second in importance only to Jupiter, he was the most prominent of the military gods in the religion of the Roman army. He was also indeed based on Ares.
 * In the DC comics there are several versions of Mars, some of which co-exist with Ares, who also uses "Mars" as his alias.