Captain Steven Grant "Steve" Rogers is a World War II veteran, a founding member of the Avengers, and Earth's first known superhero. Rogers grew up suffering from numerous health problems, and upon the United States' entry into World War II, he was rejected from serving in the United States Army despite several attempts to enlist. Rogers ultimately volunteered for Project Rebirth, where he was the only recipient of the Super Soldier Serum developed by Abraham Erskine under the Strategic Scientific Reserve. The serum healed Rogers of his medical afflictions and greatly enhanced Rogers' physical abilities to superhuman levels. Following Erskine's assassination and being disregarded by SSR head director Chester Phillips, Rogers was relegated to performing in war bond campaigns, where he posed as a patriotic mascot under the moniker of Captain America
