Ares

Ares is a god of war in Greek 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.

Behind the scenes

 * In the Greek mytholgoy Ares is indeed a god of war, one of the Twelve Olympians, and the son of Zeus and Hera. He often represents physical, violent and untamed aspects of war, in contrast to his sister Athena, whose functions as a goddess of intelligence include military strategy and generalship.
 * In the DC comics Ares, derived from the Greek mythology is famously a villainous cosmic entity who acts as antagonist to Wonder Woman. Although Ares is sometimes called Mars, there are numerous separate versions of that character as well, some of them co-existing with Ares.