Not sure where to post this.
Got to watch this logging truck being restored at the the Simcoe County Museum last summer. It has the most complex track system I've ever seen.
Took me a while to figure out how it works.
Appears to use an inner rotating roller-track to support the load...as opposed to the standard fixed rollers.
https://youtu.be/RZx92HvK4go
Seems fine in the snow...guessing muddy conditions would soon grind it to a halt.
Was this ever used in military applications ?