I am not realy sure if this is the right section. I just received this picture. In fact this is no tank, but tracks and ... obviously German. But what is it? Anyone a clue?
Looks to me like a tracked trailer - tracked to spread the weight better on soft ground. The long I-beam sticking out to the left is probably hitched to some form of tractor.
No it's not German, actually it's American used by the Russians. It is a chassie of a Allis-Chalmers half track truck used the Russians to build Heavy tracked armored cars. Here is a good link with some information.