A wooden pole? What's the approximate size? It is probably an unditching beam, which was a common item on Soviet tanks from 1941 till...well, till 1991. Some other nations used them also but not nearly so commonly as the Red Army.
The way they were used was to lay them down in front of the tank and drive over them, in an attempt to free a tank that had bottomed out in mud.
As you may know, there were entire roads made of unfinished logs in the old USSR, and for all I know they still exist.