San-Skar transformed the Planetary Defense Forces into guerrilla fighters. They carried out sabotage operations almost everywhere, making full use of the planet's terrain and facilities to hide his troops in the jungles, underground, and even underwater.
Bilbrin Planet had a vast number of factories and underground fortifications. Since it had originally been built as a fortress world, the possibility of enemy Orbital Bombardment had naturally been taken fully into account. Those underground passageways and bunkers had now become the best shelters for the guerrillas led by San-Skar.
Moreover, Bilbrin Planet also possessed extensive natural terrain. The planet had not been fully developed. It was not like Fondor Planet, where the entire world had become one enormous factory, nor like Rendili Planet or Coruscant, where the whole planet was covered in cities.
In those untamed regions, underground caves, subterranean rivers, primeval jungles, valleys, and fjords had all become guerrilla bases!
Most critically, contrary to what the Galactic Empire had imagined, San-Skar's guerrillas were not short of supplies at all!
Consider Bilbrin Planet's situation at the time—first, Thrawn had planned to abandon the planet. He withdrew most of its population, destroyed its energy facilities, and shut down its factories, but he had not destroyed the planet's infrastructure. At the time, he had intended to return and retake it quickly.
After Mal-Tuk occupied Bilbrin Planet, he spared no effort in transporting immense quantities of supplies from the rear. On one hand, he rebuilt the planet's energy facilities; on the other, he reopened its factories. At the same time, to support Mal-Tuk's upcoming campaign against Palanci Planet, countless supplies were also shipped in from the rear.
However, because transportation on Bilbrin Planet was poor, most of those supplies remained stranded on the planet. Later, after Mal-Tuk's defeat, the Planetary Defense Forces took over and