Here's something I drew for my Rome AU: The Dividuntur Fabricius 120 Ursus breakthrough/assault vehicle.
It entered service in 1942 and is armed with a powerful superstucture mounted, non turreted 120mm gun. It's armor is 250/150/100.
It was called the bear because of its size and powerful gun. It was also employed as an ambush tank destoryer, easily knocking out
enemy heavy tanks at stand-off ranges. With a top speed of 20 km/h it was slow and easily outflanked. The suspension and the gear
box was originally designed for 60-70 ton heavy tanks and had a reputation for breaking down when pushed towards its boundaries
due to the excess weight of 90 tons. Only a few hundred was built, and a few dozen either captured or destroyed. It was retired in 1952
due to more effective means for breaking enemy lines/bunkers.