Colonel James G. Earnest (6 March 1922 – 23 March 1924) Colonel Delphe T.E. Casteel (23 March 1924 – 17 August 1926) Lieutenant Colonel William H. Clifford (17 August 1926 – 13 January 1934) Lieutenant Colonel Robert B.H. Begg (13 January 1934–March 1936) Colonel Matthew F. James (March 1936–18 December 1937) Lieutenant Colonel John C. Butler (18 December 1937–March 1938) Major Max Livingston, Jr. (March–May 1938) Lieutenant Colonel Robert B.H. Begg (May 1938–July 1940) Lieutenant Colonel Max Livingston, Jr. (July 1940–after January 1941) Heraldry The 307th's distinctive unit insignia was approved on 11 January 1927, and its coat of arms was approved on the next day. Both were rescinded on 17 February 1959. The distinctive unit insignia included a 1 1/8 in (2.86 cm) gold colored metal and enamel device, which consisted of a shield with a red cross with a yellow star in the center, and a red and gold scroll below the shield, which was inscribed with the regimental motto, "Perseverandum". The shield symbolized the United States Cavalry, the cross, similar to that on the colonial seal of Virginia, represented the unit's Virginia assignment, the red symbolized its World War I field artillery service, and the star represented service in Texas. The motto was Latin for "Persevering", and was based on the motto on the reverse of the Great Seal of Virginia. The 307th's coat of arms was similar to the distinctive unit insignia except that it added the Organized Reserve crest, a Minuteman, and omitted the motto. References Citations Bibliography Cavalry regiments of the United States Army Military units and formations established in 1917 Military units and formations disestablished in 1942 Military units and formations in Virginia