Constituted 1 October 1933 in the Regular Army as the 43rd Field Artillery Redesignated 13 January 1941 as the 43rd Field Artillery Battalion Assigned 1 June 1941 to the 8th Division (later redesignated as the 8th Infantry Division) and activated at Fort Jackson, South Carolina Inactivated 20 October 1945 at Fort Leonard Wood, Missouri

Constituted 16 December 1940 in the Regular Army as the 61st Field Artillery Battalion Assigned 3 January 1941 to the 1st Cavalry Division and activated at Fort Bliss, Texas

Constituted 26 August 1941 in the Regular Army as the 64th Field Artillery Battalion and assigned to the 25th Infantry Division Activated 1 October 1941 in Hawaii A Gold color metal and enamel device 1+5⁄32 inches (2.9 cm) in height overall consisting of a shield blazoned: Gules, on a bend Or three oozlefinches Vert.

The green oozlefinch was the device on the shoulder patch worn by the railway artillery reserve in France, of which this regiment was a unit.

The distinctive unit insignia was originally approved for the 43d Coast Artillery Regiment on 1 February 1937.

The green oozlefinch was the device on the shoulder patch worn by the railway artillery reserve in France, of which this regiment was a unit.