Captain John Kelly is a notable figure in the United States military, having served as a Marine Corps officer. He gained recognition for his leadership during various operations, including his role in the Iraq War. Kelly eventually rose to the rank of four-star general, showcasing his extensive experience and commitment to service. In addition to his military career, Kelly served as the Secretary of Homeland Security under President Donald Trump. His tenure in this position involved overseeing immigration policies and national security efforts. Kelly's background in the military and government has made him a prominent voice on issues related to defense and security.