A "Corps" is a term used to describe a large group of people organized for a specific purpose, often in a military or professional context. For example, the United States Marine Corps is a branch of the military responsible for amphibious operations and rapid response. Corps can also refer to specialized groups, such as the Peace Corps, which focuses on international development and volunteer service. In addition to military uses, the term can apply to various organizations, such as the National Park Service's Youth Conservation Corps, which engages young people in environmental conservation projects. Corps are typically structured hierarchically and emphasize teamwork to achieve their goals.