 This is a list of NATO and partner nation units involved in PRTs in southern Afghanistan and most heavily engaged in combat operations in 2006.Australia is not a NATO nation but worked closely with Dutch forces, deploying a Reconstruction Task Force based around the 1st Combat Engineer Regiment with protective elements from the 5th/7th Battalion, Royal Australian Regiment, 6th Battalion, Royal Australian Regiment and 2nd Cavalry Regiment.A detachment of two CH-47 Chinook helicopters from the 5th Aviation Regiment was deployed to Afghanistan in March 2006 to support the Australian Special Forces Task Group.