Combat support agency

Combat support agency (CSA) is a designation by the United States Department of Defense (DoD) of those defense agencies that provide department-level and tactical support to the U.S. military during combat operations. The designation was first outlined by the Goldwater-Nichols Department of Defense Reorganization Act of 1986, with subsequent additions based on the department's needs.

Combat support agencies
There are currently eight agencies designated as CSAs. This includes several intelligence agencies under DoD, which have a national mandate in addition to their departmental combat support role.
 * Defense Contract Management Agency (DCMA)
 * Defense Health Agency (DHA)
 * Defense Information Systems Agency (DISA)
 * Defense Intelligence Agency (DIA)
 * Defense Logistics Agency (DLA)
 * Defense Threat Reduction Agency (DTRA)
 * National Geospatial-Intelligence Agency (NGA)
 * National Security Agency / Central Security Service (NSA/CSS)