View source for Combat support agency

{{Short description|DoD agencies that provide tactical support to the US military during combat operations}}
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[[File:DoD Organization December 2013.jpg|thumb|right|350px|DoD organization, including CSA designations.]]
'''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 Act|Goldwater-Nichols Department of Defense Reorganization Act of 1986]], with subsequent additions based on the department's needs.