I've known what the term represented for nearly 50 years since I was in the Army but I still believe the pattern was developed as one that could be used in any position, i.e. steering axle, drive axle, inside, outside, or trailer. Curbside or roadside alone of course would change the rotation. A true all position tire which is almost manditory for a tactical military vehicle. I maintain it has more to do with that and less to do with rotation for security purposes which IMO is nonsense. Military acronyms cannot be taken at face value as they are often the product of some dubious thinking. I doubt we'll settle it here however. They worked and that is all that matters.