Imjin Barracks is a British Army installation situated near Innsworth in Gloucestershire, that is home to the headquarters of NATO's Allied Rapid Reaction Corps (ARRC).

The Gurkha Allied Rapid Reaction Corps Support Battalion, or simply the Gurkha ARRC Support Battalion is a combat support unit of the British Army, and one of only three units permanently assigned to NATO. For administrative purposes, the Gurkha ARRC Support Battalion falls under the oversight of the Royal Logistic Corps, though employs members from many other cap badges.