Medieval White Elf Story

How can the loyalty of the army formed by criminals be guaranteed? I personally feel that the armies worth relying on should be the peasants of the territory, such as the army of the Qin Dynasty, the Zhechong soldiers of the Tang Dynasty, and the Junker nobles of Germany. Through the reward of land use rights, they can prevent the emergence of separatist nobles and form a centralized power. Those who have permanent property have perseverance. The soldiers and their families are bound to the land through land, which not only ensures loyalty, but also makes the soldiers pioneering (they can obtain land use rights through war).

The three golden chapters are all used to explain settings and other things. It's normal if there is no fire.