Can't do. The territorial armies will not be able to sustain themselves.
The defense of Indonesia lies with the air force and navy and it's ability to challenge or outright cancel any invasion attempt on Indonesian islands.
No worry. When Indonesian navy and air force get decimated, the super strong army boys can defend against and defeat enemy's navy, air force and army with super genius tactical guerrilla warfare in palm oil jungle.
IMO, the article did not say that the army could beat any peer adversaries alone in a conventional war
the food reserves idea ideally will also benefit lanal and lanud personnel