A 1987 to 1989 storyline in the Captain America series, written by Mark Gruenwald with art by Tom Morgan and Kieron Dwyer. The arc spans issues #332 to #350 of Captain America (vol. 1).
When the U.S. government demands Steve Rogers work directly under their command, he refuses and resigns from his role as Captain America. The government appoints John Walker, formerly the Super-Patriot, as his replacement. Rogers adopts the identity of "The Captain" and continues operating independently.
The storyline set up John Walker's later evolution into U.S. Agent.