German soldiers move a 7.5 cm leichtes Infanteriegeschütz 18 (7.5 cm le.IG 18) - light 75-mm infantry support gun to a new position to better reach enemy targets during a fight for Stalingrad; October 12, 1942.

Move to a better firing position

24 cm Theodor Bruno Kanone (E)

From Wikipedia:

The 24 cm Theodor Bruno Kanone (E - Eisenbahnlafette (railroad mounting)) was a German railroad gun used during World War II in the Battle of France and on coast-defense duties in Occupied France for the rest of the war. Six were built during the Thirties using fifty-year-old ex-naval guns. --Corrected...

Quite the Weapon

The crew of the Wehrmacht's Sd.Kfz half-track tractor moves a Flak 18 gun along the street of a Soviet settlement. On the barrel of the gun, there are marks about two shot down planes and a damaged tank; June-August 1941.