Samuel Thomas "Sam" Wilson, also known as the Falcon and later as Captain America, is a major character in the Marvel Cinematic Universe.
A U.S. Air Force officer, Sam would become an ally to Captain America and Black Widow during the HYDRA uprising, and supported them in stopping Alexander Pierce. He would become a member of the new Avengers after the original team disbanded after the Ultron Defensive, but became a fugitive in helping Captain America save his best friend Bucky Barnes, and for not signing the Sokovia Accords. Sam participated in the clash of the Avengers and was sentenced to the Raft, but was freed by Steve alongside Clint Barton, Wanda Maximoff, and Scott Lang. While on the run, Sam assisted Captain America and Black Widow in stopping terrorist cells before returning to help his allies try to stop Thanos from collecting the Infinity Stones.
The heroes failed to stop Thanos, however, and Sam was turned to dust alongside half of the universe. In 2023, Sam was resurrected by the Hulk and participated in the battle of Earth, where Iron Man sacrificed himself to stop Thanos and his army. After attending Stark's funeral, Sam was given the mantle of Captain America by an elderly Steve. Though grateful, Sam declined to take the mantle and gave it away to the Smithsonian Museum, but it was given to Captain John F. Walker. Despite his disgust with the decision, Sam focused on trying to stop the Flag Smashers, and decided to take the mantle after Walker murdered a Flag Smasher in cold blood. After stopping the Flag Smashers, Sam became the partner of Bucky and inspired a new generation of heroes by becoming the new Captain America.