Captain America (1968 Series) #308

By Mark Gruenwald & Paul Neary / Dennis Janke. 

“The Body in Question”  A Secret Wars II Tie-In

Armadillo, a huge armored monstrosity, attacks the West Coast Avengers' headquarters. Captain America uses the defense of their base to capture but discovers that Armadillo is being blackmailed by Dr. Karl Malus.