Seeking to add the technology of Tony Stark to his arsenal, the Mad Thinker decided to steal it from the Avenger's Mansion. He decided that the Avengers would be unable to stand against them without their leader, Captain America. He planned an assault when Captain America was out of town and would be unable to help them. He sent the individual members of his Triumvirate of Terror to attack them in groups of one or two. Piledriver ambushed Goliath and Wasp in a construction site.

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  1. Official Handbook of the Marvel Universe A-Z hardcover Vol. 12, Triumvirate of Terror entry

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