GU ARNG is the ground component of the Guam National Guard under control of the governor of Guam that performs missions equivalent to those of the Army National Guards of the different states of the United States, including ground defense, disaster relief, and control of civil unrest.

Delegate Gregorio Sablan to form a National Guard unit in the Northern Mariana Islands, and feasibility studies are in progress in response to the proposal.

[3] On August 6, 1997, the Guam Army National Guard assisted with the recovery efforts of Korean Air Flight 801, which crashed on approach to Antonio Won Pat International Airport.

In 2002, members of the Guam Army National Guard's 1st Battalion, 294th Infantry Regiment and the 105th Troop Command were deployed to Afghanistan as a part of Operation Enduring Freedom.

[6] Task Force Guam was the largest deployment in the history of GU ARNG and also included 17 soldiers who resided in the Northern Mariana Islands.