Captain America (1968 1st Series) #340
Iron Man guests in "Breakout" Story by Mark Gruenwald. Art by Kieron Dwyer and Al Milgrom. Cover by Ron Frenz and Bob McLeod.
Story continues from Iron Man 228. In a shocking development, Iron Man betrays his long-time friend, Steve Rogers, by rendering him immobile, so Shell-head can finish de-activating all of the Guardsmen's armor at the Vault. As a result of Iron Man's invasion of the super-villain prison in Colorado, some of the criminals are trying to escape! It's a great battle issue featuring the Captain vs. Mister Hyde, the Falcon vs. the Griffin, D-Man vs. Titania, and Nomad vs. Vibro! (Note: This is the Captain's first opportunity for payback against Mister Hyde following the events of Avengers 273-277 Masters of Evil storyline.)