Dr. Heinrich Zemo, 12th Baron Zemo was one of the top scientist in the Nazi party. Zemo fought both Captain America and his allies the Howling Commandos during World War II. A brilliant and sadistic scientific genius, Zemo created many weapons of mass destruction for Hitler’s army, including a large-scale death ray cannon, a disintegration pistol that was a miniaturize version of his death ray, and primitive androids of considerable strength and durability. Heinrich Zemo’s intelligence was only matched by his sadism, as he routinely tested his deadly weapons on innocent people, both prisoner and civilian inside the Third Reich. This ultimately came to a head, during an early encounter with the Howling Commandos, when Zemo decided to test an experimental death-ray cannon on a nearby German town. The death-ray killed hundreds of innocent German civilians as a result, making Zemo a mass murderer. Though he arrogantly believed that he could frame the Allied Forces for his act of mass murder, Nick Fury and his fellow Howling Commandos exposed Zemo’s role in the town’s destruction, resulting in Zemo becoming a reviled figure throughout Europe, even amongst his fellow Germans.
In an attempt to regain a level of anonymity, Zemo began wearing a reddish-pink hood over his face as he continued to build weapons for the Nazis. His activities ultimately drew the attention of Captain America, resulting in a confrontation just as Heinrich was ready to unveil his newest scientific breakthrough: Adhesive X, an extremely strong adhesive that could not be dissolved or removed by any known process at the time. It was only after the war that the adhesive-using villain Paste-pot Pete found a way to neutralize it
In order to ensure that the Nazis could not use Adhesive X against Allied troops, Captain America confronted Zemo in an attempt to destroy the limited supply. Captain America threw his shield at the vat to release the adhesive onto the ground. Zemo however was standing right next to the vat containing the chemical, which poured over his hooded face. The adhesive quickly seeped inside and permanently attached the hood to Heinrich’s flesh, preventing Zemo from ever removing his hood.