*Captain America: The First Avenger* (2011) is the origin story of Steve Rogers, a scrawny but courageous young man who dreams of serving his country during World War II. Rejected multiple times due to his frail physique, Steve refuses to give up and finally gets his chance when Dr. Abraham Erskine selects him for the top-secret Super Soldier Program. With the help of scientist Howard Stark and British agent Peggy Carter, Steve undergoes a transformation, gaining enhanced strength, agility, and endurance. However, before the serum can be replicated, Erskine is assassinated by a Hydra agent, leaving Steve as the only super soldier in existence.