The Army once again reorganized and re-designated our current organization as the 12th Armored Group on 13 December 1943 for service in World War II.

The 12th Armored Group participated in the Ardennes-Alsace, Rhineland, and Central Europe Campaigns and was awarded the Presidential Unit Citation for actions during the Battle of Bastogne.

After World War II, the Army redeployed the 12th Armored Group to Camp Gruber, Oklahoma, where it was deactivated during October 1945.

The Army reactivated the 120th Infantry Brigade on 1 December 2006 to serve the nation once again at Fort Sam Houston, Texas.

The Army moved the 120th Infantry Brigade to Fort Hood, Texas, on 1 September 2008 with a mission of providing post mobilization training to Army Reserve and National Guard Soldiers deploying to support the Global War on Terrorism The unit is composed of: This article incorporates public domain material from Lineage & Honors for 120th Infantry Brigade.