Nicole Bengiveno/The New York Times At Sotheby's on Tuesday, Terry McAllister, left, and James Parker moved the Connecticut regimental battle flag. Sotheby'sOne of the Virginia infantry flags believed to have been captured by a British commander, Lt. Col. Banastre Tarleton, in a bloody battle in the Carolinas in May 1780. The war veterans who once revered them and followed them - and then lost them - are all long gone. But now, their battle standards, taken by the enemy, have at last returned to American soil after two and a quarter centuries. The flags are believed to date from...