The 66th Theater Aviation Command of the Washington Army National Guard was one of only two such one-star commanded aviation commands 2007-2017. The other being the 11th TAC of the USAR. Prior to the 66th TAC designation, during the period 1986-2007, was previously designated as a Corp Aviation Brigade, with its guidon based at Gray Army Airfield (KGRF), Joint Base Lewis-McChord, Wash. It included 1-168th General Support Aviation Battalion. The 66th TAC was composed of two Theater Aviation Brigades (the 185th Aviation Brigade and the 449th Aviation Brigade and the 204th Theater Aviation Operations Group.