The Secret Empire Storyline
Steve Englehart (writer), Sal Buscema (pencils), Vince Colletta (inks), George Roussos (colors), Charlotte Jetter (letters)
Printed in Captain America and Falcon #174-175, Jun. 1974 - Jul. 1973.
Captain America and Falcon team-up with the X-Men to take on the forces of the Secret Empire. Peggy Carter is now an agent of S.H.I.E.L.D. and has joined with a fellow agent, Gabe Jones, to infiltrate that organization.