The gallant stand of the 101st Airborne Division at Bastogne has long become part of historical and media legend. But how many students of the war realize there was already a U.S. unit holding the town when they arrived? And this unit--the 10th Armored Division--continued to play a major role in its defense throughout the German onslaught.

In The Tigers of Bastogne, authors King and Collins finally detail the travails of this young armored division, which had only arrived in Europe that fall, yet found itself subject to the full brunt of Manteuffel's Fifth Panzer Army in the...