.... He is, without exception, the best cavalry commander the Army of the Potomac has ever had. He is quick to perceive and bold to execute, and has already won the entire confidence of his command. Brigadier-General D. McM. Gregg was General Sheridan's right-hand man. He consulted him on all occasions, and placed in him the utmost confidence. He knew that where Gregg was, with his fighting division, everything was moving al...