Originally organized as a part of the 95th Infantry Division for World War I, the brigade never saw combat in that conflict.

Kept active and in the reserve through much of the 20th century, the brigade in name was reorganized into a different unit for fighting during World War II.

Seeing numerous moves, activations and deactivations, the brigade has been used principally as a training unit for most of its existence.

Reactivated again in 2006, the brigade is now primarily responsible for training provincial reconstruction teams and their supporting elements for deployment to the War in Afghanistan.

The 189th Infantry Brigade was first constituted and activated on 24 June 1921 in the Organized Reserves, and assigned to the 95th Division.

[2] It would stay active as a reserve brigade for the interwar period, but it would not be utilized for any pertinent missions.

[2] The formation saw great changes in preparation for mobilization to fight during World War II.

On 13 February 1942 the brigade structure was downsized greatly and converted into a reconnaissance element.

It was combined with assets from the 190th Infantry Brigade to form the 95th Reconnaissance Troop which was subsequently assigned to the 95th Division once again.

[2] After the end of World War II, the troop returned home and began the process of demobilization.

[1] Since its reactivation, the brigade has specialized in training provincial reconstruction teams (PRTs) deploying to Afghanistan.

The brigade has worked closely with the Civilian Response Corps to standardize and institutionalize the training for the PRTs.

These PRTs include members of the Army, Navy, Air Force, and civilian military contractors, as well as members of the UN Assistance Mission Agency (sic: United Nations Assistance Mission in Afghanistan?

[12] It has also been responsible for training security forces that guard the PRTs, including elements of the 33rd Infantry Brigade Combat Team.