In the beginning, the system was primarily a convenient system for collecting armies. At the end of the 11th century when the Byzantine Empire was suffering from internal and external problems, due to the lack of an army, the emperor began to grant his cronies the privilege of levying taxes and training armies in the provinces in order for them to regain their strength as quickly as possible. However, when the situation stabilized, the Planonian system became similar to the tax-paying system, as those who were granted the privilege preferred to pay taxes rather than to undertake military obligations. in the mid-12th century, with the failure of the Byzantine adventures in Southern Italy, as there was no more money to pay for the army, the emperor began to grant the army the right to levy taxes on the spot in lieu of the regular military pay, which was similar to the Slangjin system used by the modern Chinese in their siege of the Taiping Rebellion. Slangjin system. As the army felt that it could support itself, it began to rebel non-stop, and from then on, the negative effects of the Planonian system began to emerge, intensified, and eventually destroyed the Byzantine Empire.