Defense Communication Agency, Pentagon

The Defense Communications Agency (DCA) was established in 1960 at the Pentagon to unify and manage the U.S. military's global communications networks. Tasked with ensuring secure and reliable communication across all branches of the Department of Defense, the DCA played a pivotal role during the Cold War era, supporting critical command and control functions. The agency was instrumental in developing advanced communication technologies and protocols, such as the Defense Data Network and early internet precursors. In 1991, the DCA was reorganized and renamed the Defense Information Systems Agency (DISA), continuing its mission in support of national defense.