Soldiers of the U.S. 7th Armored Division check out a German 380-mm railway gun (38-cm SK L/45 Max), captured in Holland; 1944.
The 38 cm SK L/45 "Max", also called Langer Max (literal translation "Long Max") was a German long-range, heavy siege and coast-defense gun. 

Inspect and clown with

Front view of 240mm (9.4 inch) howitzer of Battery `B’, 697th Field Artillery Battalion, just before firing into German held territory. Mignano area, Italy. January 30, 1944
taken from fb/History of WW2

FIRE!

American soldiers walk past a Dodge WC54 ambulance and a  Caterpillar R4 "Tilt Dozer" bulldozer on a street of a destroyed French town of La Haye-du-Puits in north-western France; 1944.