This is the Boirault machine, it is a type of tank, but very unusual.
As you have seen in countless movies, barbed wired and other kinds of barriers are a problem. This tank climbs, pulls down and crushes them (or goes over top…).
This is older technology, but very clever. Modern thanks have some of the same form factor and capability. Turns out the up-slope in the track is useful in many ways.
