[2] During mid-August 1990, a provisional CA detachment deployed to Saudi Arabia to support I MEF in Southwest Asia for Operation Desert Shield.

In addition to conducting civil affairs activities, 3rd CAG provided limited tactical psychological operations support for mission accomplishment.

In the summer of 1994, 3rd CAG proposed a revised table of organization to Headquarters Marine Corps that added a psychological operations planning detachment.

In 2001, 3rd CAG supported civic action programs for United States Southern Command in Central and South America, relying heavily upon the bilingual capabilities of its many Spanish-speaking Marines.

With the commencement of the ground war in March 2003, 3rd CAG helped restore Iraq's infrastructure and government, concluding its first tour of Operation Iraqi Freedom in September 2003.

In January 2004, 3rd CAG mobilized and deployed for a second tour in Iraq to support I MEF in al-Anbar province and returned to Camp Pendleton in August.

[4] In December 2005, 3rd CAG mobilized and deployed in March 2006 for a third tour in Iraq to support I MEF in al-Anbar and returned to Camp Pendleton in October 2006.