U.S. World War Two veteran of the 4th Fusilliers Battalion attends a parade to commemorate the Battle of the Bulge in Bastogne, December 18, 2004. Belgium and [Luxembourg] commemorate the Battle of the Bulge, a last-ditch German offensive on December 16, 1944 which was the bloodiest land battle of WW2 involving US troops, who suffered some 80,000 casualties, of which 19,000 were killed.