33rd Cavalry Regiment was organized in April, 1863, by using the 14th ( Duff's) Texas Cavalry Battalion as its nucleus. It's members were recruited at San Antonio, Port Lavaca, Mt Vernon, and in Kaufman County. This unit served in Gano's and Harderman's Brigade, Trans Mississippi Department, and along the lower Rio Grande. In April 1864, it was near Bonham, Texas and contained 23 officersand 307 men. On June 2, 1865, it was included in the surrender. The field officers wer Colonel James Duff, Lietenant Colonel James R. Sweet, and Majors Santos Benavides and John T. Brackenridge.