On November 1, 1955, 4th CAG was activated originally as
5th Staff Group at
Henderson Hall,
Arlington, Virginia. The first commanding officer was Colonel Winslow H. Randolph Jr. In 1973, the unit had a table of organization of 30 officers and 50 enlisted and was commanded by Colonel J. Z. Taylor. In the late 1970s, 4th CAG supported several iterations of
Operation Solid Shield with
NATO. In 1979, 4th CAG was relocated to
Naval Support Facility Anacostia. The entire unit was activated for the first time in December 1990 and deployed for
Operation Desert Storm in 1991. During Operation Desert Storm, 4th CAG was assigned to
2nd Marine Division and helped process over 10,000 Iraqi POWs. Immediately upon return from the Middle East, a detachment from 4th CAG deployed to
Northern Iraq in support of
Operation Provide Comfort to provide humanitarian aid to Kurdish refugees. 4th CAG sent numerous detachments to the
Balkans in mid-1990s until 2003. 4th CAG participated in numerous
New Horizons missions in Central/South America and the
Caribbean Islands. 4th CAG deployed to Iraq three times for the
Iraq War: (1) February to September 2003, (2) August 2004 to March 2005 and (3) September 2006 to April 2007. 4th CAG sent a detachment to support
Joint Task Force Katrina in
New Orleans, Louisiana, from September to October 2005. 4th Civil Affairs Group also sent detachments to Afghanistan for
Operation Enduring Freedom in May 2009, November 2009, and August 2011 and participated in
Operation Strike of the Sword. On December 15, 2013, 4th CAG was reactivated and relocated to Hialeah, Florida, as part of the Force Structure Review. Colonel Augustin Bolanio was assigned as the Group Commander and Sergeant Major Mark T. Davis was posted as the Group Sergeant Major. 4th CAG's primary mission is to provide civil affairs support to the U.S. Southern Command. ==Unit awards==