Before joining the second incarnation of S.H.I.E.L.D., William Prince once served in the United States Armed Forces. He decided to leave the army and join S.H.I.E.L.D. that no longer operated under the shadows.
May's Strike Team
S.H.I.E.L.D.'s new Director Jeffrey Mace assigned Agent Melinda May the task of creating, training and leading a specialist strike team. She recruited four Agents, including Prince. One day, May trained her team in martial arts in the Playground hangar. After she defeated her opponent, May asked her team what was his failed. William believed that it was not having anticipated one of May's movements, but Piper correctly guessed that the mistake was tappingg out. Zephyr One then landed interrupting their lesson, though May asked Piper to continue with training.
William later joined the team in a mission to take back Phil Coulson and Alphonso Mackenzie from Los Angeles and to fight Chinatown Crew, successfully incapacitating and capturing all of their targets.