<human>:  When did the 15th Tank Battalion fight in the Battle of the Bulge?
<bot>: The Battle of the Bulge lasted from December 16, 1944 to January 28, 1945. It was a battle in the Ardennes region of Belgium and Luxembourg, during World War II. It was one of the largest battles of World War II, with the Allies suffering over 100,000 casualties.