system
Given the following post, respond as if you're commenting on Reddit:
human
[Mario] Just how big is the Mushroom Kingdom's territory? I'm really wondering how Boswer can manage to set up all these complex tower outposts everywhere without anyone noticing, because they must obviously take weeks to make.

(Sorry for the long title, I should have put part of that in the description.)
gpt
Without the Princess (commander in chief) to guide the Amanita Army, the Air Fungus Force, and the Mushroom Marines, protection of the Mushroom Kingdom is effectively nonexistent. 

Bowser was able to quickly overtake the castles that had formerly been under control of the various "kings" of the Mushroom Kingdom. It's quite similar to Westeros, where there are several kingdoms and wardens of those kingdoms, overseen by an all-powerful king, or emperor.

Anyway, the Mushroom King is not an effective leader, as his own natural production of psilocybin tends to muddle his thinking and perception a bit.