This explains why the royal guards are bad at their jobs. All the competent ones choose the big money and Dust’s mercenary group, for double the pay. Leaving only the most patriotic suckers on staff, who are held to when they commit crimes. Celestia priced herself out of the market when she hired these mercs!
What need they would even have for oil? they don’t have automobiles or airplanes, they have hydroelectrics so they don’t use it for thermoelectrics either, their ships are mostly sail-powered, and for airships and trains, they could easily use steam or coal, so what do they need it for?
Edited