... Gregg's brigade under Robertson-the First Texas under Col. A. T. Rainey, the Fourth under Col. J. C. G. Key, and the Fifth under Col. R. M. Powell was also in this trying campaign, and remained in East Tennessee until ordered to Virginia the following spring. After the battle of Chickamauga, Colonel Granbury's regiment was transferred to Deshler's brigade and Gen. J. A. Smith assigned to command. ...