The Defense Information Systems Agency (DISA) is a United States Department of Defense agency responsible for providing information technology and communications support to military operations. Established in 1960, DISA ensures that the U.S. military has secure and reliable access to information systems and networks. DISA plays a crucial role in managing the Defense Information Network and supporting various military branches, including the Army, Navy, Air Force, and Marine Corps. The agency also develops and implements cybersecurity measures to protect sensitive data and maintain operational readiness in a rapidly evolving technological landscape.