61st Air Defense Artillery
The distinctive unit insignia was originally approved for the 61st Artillery Battalion on 16 November 1923. It was redesignated for the 61st Coast Artillery Regiment on 12 December 1939. The insignia was redesignated for the 61st Antiaircraft Artillery Automatic Weapons Battalion on 10 August 1955. It was redesignated for the 61st Artillery Regiment on 19 December 1958. It was redesignated for the 61st Air Defense Artillery Regiment effective 1 September 1971.