M114 155mm Howitzer and
Morser 21cm Siege Howitzer
This M114 155mm Howitzer (on the left in photo) was a medium towed howitzer manufactured at Sorel Industries Limited in Quebec. The M114 was first produced by the U.S. in 1942 as a medium artillery piece under the designation of 155mm Howitzer M1.
The German 21cm Mörser 1910 pattern (on right in photo) was a massive Krupp siege Mörser (morter). It could fire a shell about 10 kms. They are seen with or without tire-traction pads, shoes that helped keep the massive weight from tearing up roads and bogging the gun down.