Wonder Woman: The Golden Age Omnibus #4

Ironsides is the brother of Dr. Psycho, as brilliant a geologist as Dr. Psycho and was a hypnotist. Discovering a volcano whose eruptions contained large amounts of molten gold in the Pacific island nation Wooloo, he decks himself and his gang in armor and stilts, becoming iron giants and himself King Ironsides. Chief Loko requests the aid of Army Intelligence agents to battle the group of iron giants that are kidnapping members of his tribe to mine gold. Wonder Woman exposes the giants as men dressed in iron suits and captured King Ironsides and his men.