Green Lantern

John Stewart was recruited by the Green Lantern Corps and trained for ten years, before returning shortly after Abin Sur's death. He became a founding member of the Justice League. He is also the father of future JLU member Warhawk. John Stewart left home to enlist in the United States Marine Corps at a fairly young age. Relatively little is known of John's military service, save that he met and befriended Rex Mason during that time. After leaving the service, John Stewart was selected by the Guardians of the Universe to join the Green Lantern Corps. Early in his Corps career, John would train under the veteran Green Lantern Katma Tui. As Sector 2814 was already under the protection of Green Lantern Abin Sur, John was eventually reassigned to another space sector. It was only several years later following Abin Sur's demise at the hands of Sinestro that John would return to his home sector. Abin Sur's designated successor, Kyle Rayner, would himself require training before being assigned a sector of his own. John Stewart was therefore sent to stand guard over Sector 2814, while Kyle Rayner was sent to Katma Tui for training. Not long after John's homecoming, he would answer the fateful summons to join six other heroes in opposing the Imperium invasion. In the aftermath of that crisis, John readily agreed to Superman's suggestion that the seven heroes band together as the Justice League.