Created by writer and artist John Byrne, the team first appeared in The Uncanny X-Men #120 (April 1979).
Most team members have distinctly Canadian attributes, such as having Inuit/First Nations or French heritage. Throughout most of its history, the team has worked for Department H, a fictional branch of Canada’s Department of National Defence that deals with super-powered villains.
The team was originally merely a part of the backstory of the X-Men‘s Wolverine but, in 1983, Marvel launched an eponymous series featuring the group, which continued until 1994, lasting 130 issues as well as annuals and miniseries.
EHT Comics 