Steve Rogers is the most famous super soldier in the Marvel Cinematic Universe, but there are many other characters who were injected with the infamous Super Soldier Serum. Developed by Abraham Erskine, the prospects of a serum that could give someone superhuman abilities made him a target of Adolf Hitler. Although he was forced to complete the formula for the Nazis, the experiments did not go as planned. Erskine was imprisoned for his failure, but later rescued by the MCU's Peggy Carter, who helped make him an ally of the United States. It was in 1943 that the Super Soldier Serum was finally perfected and ready to use, and versions of the serum have since been used to create super soldiers in the MCU.
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