The Chief of Staff of the Army (CSA) is the highest-ranking officer in the United States Army. This position is responsible for overseeing the Army's operations, personnel, and planning. The CSA advises the Secretary of the Army and the President on military matters and helps shape Army policy and strategy. The Chief of Staff is a four-star general and serves as a member of the Joint Chiefs of Staff, which includes leaders from other branches of the U.S. military. The CSA plays a crucial role in ensuring the Army is prepared to meet national defense needs and supports military readiness and modernization efforts.