Uncanny X-Men Vol.1 #109
Wolverine's past comes back to haunt him. The Canadian Government sends a super-agent to bring back the awol mutant. When the super-powered Vindicator arrives at Xavier's institute, Wolverine finds himself in the battle of his life against a man that was once his friend, and the X-Men are stuck in the middle.
Printed: Feb 1978
Writers: Chris Claremont
Art: John Byrne and Terry Austin
Cover: Dave Cockrum, Terry Austin and Irving Watanabe