That's more of a charade than a parade
You gotto commend good ol' Kim for being quite resourceful for the complete scumbag that he is.

The guy would have had people tow those MLRS straight up to the front lines on foot if required. The same people who he starves & deprives of the basic necessities of life on a daily basis.
That photo in the link you posted, Feanor, actually paints a very disturbing & sick picture of N.Korea ( or DPRK

), made even more so by the utter cleanliness & spot-on picture perfect display in that parade.