
It is an acceptance of resignation of 1st Lt Bogart of Co B, 3rd E Tenn Cav (Union) due to disability dated Feb 1863. The order was signed by Cpt Henry Thrall, Assistant Adjutant, who would die in September of 1863. 2, The Western Theatre (Bloomington: Indiana University Press, 1993), 18-28. Governor Andrew Johnson authorized Wilham C. Pickens, of Sevier County, to raise a regiment of cavalry, and the first recruits for Co.
"A" were received at Cumberland Gap on August 10, 1862. Morgan evacuated Cumberland Gap on September 17, 1862, and Co.
"A" of this regiment accompanied him on his withdrawal to Sciotoville, Ohio. From here it moved to Covington, Kentucky, where it was first mustered into service, and then to Louisville, Kentucky, where recruits for Companies "B", "C", "D", and "E" reported for duty. These five companies were ordered to Nashville, as guards for Government stores. They reached Nashville on December 24, 1862, where field officers were appointed on January 1, 1863. At Nashville, it was assigned to Brigadier General Robert B. Mitchell's 4th Division, Center XIV Army Corps, but detached for service with Brigadier General James G. Spears' 1st Brigade, 2nd Division, and Colonel Daniel McCook's 2nd Brigade, 4th Division.General Spears reported that 300 men from the 3rd, under Colonel Pickens, formed part of his force which guarded a train of 303 wagons from Nashville to the Army at Murfreesboro on January 2, 1863. On arrival, the cavalry was turned over to Major General David S. Colonel McCook reported 150 men from the 3rd Tennessee Cavalry with his force which escorted a hospital train and an ammunition train on January 3. On January 8, the regiment was assigned to Colonel Robert H. Minty's 3rd Brigade of Stanley's Cavalry Division.
On January 27, at Murfreesboro, the regiment, with five companies, was mustered into U. On January 31, 40 men from the 3rd were with the 2nd Tennessee Cavalry in an engagement at Middleton, Tennessee, in which Major DeWitt C. Douglass, and other officers and men of Douglass's Cavalry Battalion, C.
On April 20, 1863, the regiment, under Lieutenant Colonel Thornburgh, took part in an expedition which defeated Brigadier General John II. Morgan and captured McMinnville, Tennessee.