...as ordered to proceed to Sharpsburg with all the force under my command, Colquitt's brigade and mine, to drive out a Federal cavalry force reported to be there. On the way Colonel Chilton, chief of General Lee 's staff, met me with contrary orders, which required me to send only a part of my force. The Fifth and Sixth Alabama were sent. In a few minutes, however, we received orders from General Longstre...