On Dec. 21, 1864, as William Tecumseh Sherman’s army came to the end of its devastating March to the Sea, his soldiers found a gift awaiting them in Savannah, Ga. A new wardrobe. A flotilla of transport ships in the harbor was crammed with comforts for the more than 62,000 weary men: tens of thousands of sturdy boots and shoes, fresh shirts, socks, underwear and trousers.