The Justice League began as a secret association of the best Axis vets around late 2001. At the time War2 saw many newbie clans founded every month. A new clan with unknown players who seemed to know nothing about the game and who made bold claims was met with mockery and disdain at every turn, even causing one Axis veteran player to switch sides to teach the newbie JL a lesson. As the round wore on, the Justice League distinguished themselves as the most formidable clan in the game and the fact that many Axis vets were otherwise unaccounted for left little doubt as to the true nature of the League.

The League made a return appearance two rounds later, which resulted in 3 members finishing in the top 5(including rank 1 and 2) and members were also the most prolific Axis nukers. While the identies of certain members was readily ascertained from playstyle, the majority remained unknown to outsiders. The League returned several times in the years ahead, usually after one side had been losing frequently the League would attempt to restore "justice" by playing on that side. The membership roster changed throughout, with some heroic identies being played by different players throughout the years.

The most memorable Justice League player was probably the original Flash, who would always add "IN A FLASH" at the end of his forum posts which many players found extremely annoying, especially when he was thought to be a newbie.