Should a 120mm mortar be towed by a prime mover?

[plloyd1010]

An academic question at this point, but interesting. A medium mortar cannot ne towed, thus could not. But the Soviet 120-mm mortar Model 1943 was designed to be towed on a small carriage. The 160mm, appearing in Modern War, is towed only. The German copy of 1943 is also towed only. But both the 160mm and the German 120mm have the red T's, making the issue a little less ambiguous.

I think all 3 should be towable by prime movers.