Legion, also known as David Haller, was created by writer Chris Claremont and artist Bill Sienkiewicz and first appeared in New Mutants #25, marking his introduction into the Marvel Comics universe.
Legion received his first ongoing solo comic book series, exploring his complex personality and multiple personalities, expanding his character depth.
Legion was reintroduced prominently as a complex and pivotal character in the 'X-Men: Legacy' series, gaining renewed popularity.
Legion made his live-action debut portrayed by Dan Stevens in the critically acclaimed FX television series 'Legion', bringing the character to a broader audience.
David Haller is born to Charles Xavier and Gabrielle Haller, possessing immense mutant powers from birth.
David's multiple personalities begin to manifest, each with distinct mutant abilities, forming the Legion persona.
During a traumatic event at a camp, David's powers violently manifest, leading to multiple casualties and his institutionalization.
David is admitted to Clockworks Psychiatric Hospital after being deemed a danger due to his unstable powers and personalities.
David's mind-space is invaded by the Shadow King, sparking a deep psychic battle within his fractured psyche.
Legion escapes the hospital to avoid capture, during which he struggles to control his powers and prevent catastrophic events.
Several prominent personalities collaborate within David's mind to maintain control and protect him from destructive impulses.
Legion manipulates time at a crucial event, causing alternate realities and complicating X-Men timelines.
David successfully contains Shadow King within his mind, gaining greater control over his powers and personalities.
David undergoes training to better control his multiple personas and vast abilities through the Weapon X program.
Legion plays a key role in battling Apocalypse, using his reality-warping abilities to aid the X-Men.
An attempt is made to integrate David's fragmented personalities into a cohesive whole, with limited success.
Legion sacrifices a fragment of himself to repair damaged timelines and prevent a multiverse collapse.
