Background The distinctive unit insignia was approved on 11 June 1929.

Background The distinctive unit insignia was approved on 9 July 1958.

Background The distinctive unit insignia was approved on 31 March 1925.

Background The distinctive unit insignia was approved on 16 June 1927.

Background The distinctive unit insignia was approved on 16 March 1987.

Background The distinctive unit insignia was approved on 15 March 1926.

Background The distinctive unit insignia was approved on 2 March 1938.

Background The distinctive unit insignia was approved on 18 May 1951.

Background The distinctive unit insignia was approved on 3 March 1931.

Background The distinctive unit insignia was approved on 21 April 2010.