Captain Steven Grant "Steve" Rogers is the only living, successful test subject of the Super Soldier Serum developed by Abraham Erskine during the Second World War. The patriotic super soldier was given the title of Captain America and fought against the Nazis and their rogue science division HYDRA. Rogers was frozen for nearly seventy years and awoke in the twenty-first century, where he joined the Avengers as their team leader. After the Battle of New York, Rogers became a S.H.I.E.L.D. agent. He went on several covert missions with agent Natasha Romanoff and S.H.I.E.L.D. counter-terrorism team, Strike. Both Rogers and Romanoff discovered that HYDRA had secretly operated within S.H.I.E.L.D. for decades. Rogers, with the help of Sam Wilson, was able to destroy HYDRA's Helicarriers for Proj