Original: Stoneman ordered Burbridge to bring his division of 4,200 cavalrymen through the Cumberland Gap to join Stoneman and Gillem at Knoxville, Tennessee, where Gillem was refitting his own command into a picked force of 1,500 men.
Simplified: Stoneman ordered Burbridge to bring his army of 4,200 men through the Cumberland Gap to join Stoneman and General Gillem at Knoxville, Tennessee where Gillem was refitting his own command into a picked force of 1,500 men.