The Avengers are a superhero team that appear in the fictional Marvel Universe. The team, comprising existing Marvel characters variously created by writer-editor Stan Lee, artist and co-plotter Jack Kirby and others, first appeared in The Avengers #1 (Sept. 1963).
Tagged by the company as "Earth’s Mightiest Heroes", the Avengers originally consisted of Ant-Man, Wasp, Thor, Iron Man, and the Hulk. Almost from inception, however, the roster has been fluid, with the Hulk departing and Captain America joining.  The rotating roster has become a hallmark of the team, although one theme remains consistent: the Avengers fight the foes no single superhero can withstand - hence their famous cry of "Avengers Assemble!" To that end, the team has featured humans, robots, gods, aliens, supernatural beings and even former villains.
Writer Kurt Busiek and penciler George Perez launched volume three of the series with Avengers vol. 3, #1 (Feb. 1998). New members during this run included the former Ms. Marvel, Carol Danvers (now Warbird); the revived Wonder Man; Justice; Firestar; Silverclaw; and Triathlon.
Perez eventually left the title after nearly 3 years and Busiek remained on longer and completed his run with a story arc involving the despotic time-travel master Kang and the destruction of several cities. Successor writer Geoff Johns dealt with the aftermath, as the Avengers are granted international authority by the United Nations. Members joining during this period included Jack of Hearts and the second Ant-Man. Chuck Austen followed as writer, and added a new Captain Britain to the team. Writer Brian Michael Bendis then rebooted the title with of the storyline "Avengers Disassembled". Entitled "Chaos", the story featured the deaths of some members and a loss of credibility for the team.