The Brigade contains six battalions and a Headquarters and Headquarters Company.

Headquarters and Headquarters Company is stationed in Modesto, California.

The consolidated unit designated as Headquarters and Headquarters Company, First Army.

Roy was recognized as an "honorary" first sergeant of the Headquarters and Headquarters Company.

Redesignated 1976-06-21 as Headquarters and Headquarters Company, 44th Medical Brigade.

The Headquarters and Headquarters Company of the unit is located at Grafenwöhr, Germany.

Redesignated 23 March 1925 as Headquarters and Headquarters Company, 171st Brigade.

Headquarters and Headquarters Company is stationed in San Bernardino, California.

To support the line companies, the Headquarters and Headquarters Company receives special training in specific skills such as mortars, medical care, and communications.

Redesignated 1953-09-25 as Headquarters and Headquarters Company, 15th Armor Group.