The 116th Cavalry Brigade Combat Team is the largest formation of the Idaho Army National Guard. It is headquartered at Gowen Field, Boise, Idaho. It has been reorganized into a Heavy Brigade Combat Team (HBCT). The 116th Cavalry Brigade Combat Team has units located throughout Idaho, Montana, and Oregon. It was reorganized into a heavy armor brigade in 1989. Often referred to as the Snake River Brigade and formerly known as the 116th Armored Cavalry Regiment, the unit includes about 3,000 citizen-soldiers from Idaho.