considering new stealth nerf for tanks movement, here is a video.
That’s a cold war era Patton tank though. WW2 era tanks wouldn’t have been as effective climbers. Plus there’s a big difference between climbing up concrete and mud.
will copy answer from quora
This graphic represents the forward (i.e. uphill/down hill) slopes used for most US tracked vehicle designs. The 60% slope is based on traction which may be expected under field conditions. Some sources quote the forward slope capability of tracked vehicles as 40 degrees, but this is steeper than the expected traction limit, and probably steeper than the powerplant can provide.
Sideslope limits are based on rollover requirements and track misguiding. Sideslope requirements are usually 40% sideslope. You can see from this graphic that a 40 degree sideslope would be at or beyond the rollover limit for most vehicles.
An M48A3 tank has been used for this graphic, but other tanks are similar with respect to slope requirements.
Is that why even a small crater seems to be a huge obstacle now?