The ZIS-E134 in the middle picture says 3 driving axles on a single track? Oh, I get it, all 3 wheels are in line on the same path. Duh
I guess they steer it like a tank or bulldozer, by braking one side. If the left side was in a rut, and they tried to turn left by braking the left side and driving the right, the left side tires would take a hell of a beating, if it didn't rip them off the rims entirely.
Makes our Command car look puny.