Captain America: The First Avenger tells the story of Steve Rogers, a young guy who wants nothing more than to serve his country by fighting in World War II. The only problem is he's been classified 4F (unfit for military service). Steve's best friend, James "Bucky" Barnes, is a sergeant in the US Army and although he feels for his friend, he knows he wouldn't last long in battle with his frail frame. Bucky tries to talk Steve into giving up on the Army, but can't help but support him every time he tries to enlist (using different aliases in different recruiting offices). It is during one of these conversations that Steve's determination is noticed by a German scientist who is looking for candidates for his super soldier program.