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 an Armored Brigade Combat Team (ABCT) but remains the only unit to be designated a "Cavalry Brigade Combat Team" by special appointment of the US Army. The 116th Cavalry Brigade Combat Team has units located throughout Idaho, Montana, Oregon, and Nevada. 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.