Artillary

4.2" (107mm) used by Chemical Warfare Service mortar battalions. Fired smoke (WP) and a very useful HE round. Later in the war larger experimental mortars were designed and built, but never reached used in any numbers.

http://www.100thww2.org/support/cm/m2mortar.html

 

German 210mm Howitzer
The giant guns that fought each other from across the Channel. Some of the last areas of the Reich to fall.