Protocide Shield

The man who was later to be known as Protocide was found in a SHIELD warehouse by three agents who were tasked with cataloging the various artifacts within. Unbeknownst to two of the agents, one of them was a spy for AIM, who then shot his supposed colleagues and escaped with the crate containing Clinton's body.

Upon discovering that Clinton's body contained a prototype version of the Super Soldier Serum, which had resulted in his death, AIM set about bringing him back to life. The revived Clinton was told his name is Protocide, with his name deriving from the fact he was a prototype. Forgoing any laboratory tests, they pitted him against three security robots, which he defeated quickly and easily.

Thanks to an AI construct, AIM discovered that he was formerly an Army private who killed his commanding officer. He was let out of lock-up by General Saunder and two rogue generals who believed him a better candidate for Professor Erskine's super soldier formula then the skinny and weaker Steve Rogers. Unbeknownst to them, there was three ingredients to Erskine Super Soldier Serum and taken one immediately after the other. So the General Saunders only gave one of the ingredient samples to McIntyre, which resulted in his death and Saunders taking sole blame. After resurrecting McIntyre, AIM gave him false memory implants. In these false memories, McIntyre had been personally chosen by Professor Erskine, as he was the perfect physical specimen, only to be later disposed of by Steve Rogers in Nazi-controlled Europe in order to allow Rogers to continue as the only US Super Soldier.

Protocide's first mission was to locate and engage US Agent, whom he defeated by stabbing his shield through US Agent's own one and into his chest, thus paralyzing him. He was next sent to obtain a chemical agent from a SHIELD convoy, where he fought and almost killed Captain America. He was ordered to refrain from landing a killing blow in order to instead prioritize securing the chemical agent. He was struck by Captain America from behind and had to escape being captured by SHIELD forces.

As Protocide, McIntyre was sent after every HYDRA safehouse that AIM could locate, and it was at one of those locations that he again faced Captain America. After being beaten by his foe, he and Protocide had to team-up to avoid being killed by the remaining HYDRA forces. Upon being struck by a beam from a neural shock beam, Protocide was knocked into the HYDRA energy core, only just catching a small ledge. Captain America managed to pull him free, telling Protocide that he had been given a second chance and should use his gift to make the world a better place. He used this opportunity to throw Cap into the energy core and left, proclaiming himself Captain America.

SHIELD tracked Protocide to a secret AIM bunker which Captain America invaded and again fought Protocide. Protocide managed to get the better of Cap, but upon stabbing his hand to get him to fall into the spinning blades of a helicopter, Cap managed to swing himself back onto the ledge. The Avenger then tossed his shield into the helicopter, slicing the blades free and sending the helicopter into a crash. The resulting explosion caused the base to begin to fall apart, almost sending Cap to his death. Protocide had managed to get a stable hand-hold and grabbed Cap as he fell, though it may just have been the basic human reaction of wanting to catch a falling object. As the base quickly approached its destruction, Protocide threw Cap out of it, leaving the Avenger to believe he had perished.