The crew of an American M36 ACS tank destroyer keeping the .50 caliber machine gun ready in the frost covered Ardennes. 

Battle of the Bulge

Tank crews with their Sherman tanks in the background, (one an M4A1, the other an M4A3E2) belonging to the U.S. 3rd Armored Division, view the German positions in the Ardennes; Battle of the Bulge, December 1944.

In the Ardennes

 A Sherman M4A1 tank with soldiers of the 3rd Battalion, 16th Infantry Regiment, U.S. 1st Infantry Division, moves forward on the street of the snow covered Belgian town Schoten. Battle of the Bulge, December 1944.