Ager was founded when the population of Arethor started growing too large to support itself, and more room was needed for expansion. The town grew out of a small start south of the capital of Renatus, near the northern border of Hanseti. Cheap housing and available farmland to grow reeds, wheat, pumpkins and melons attracted many to live in the town.
In year 38 the Plague struck Renatus. The worst hit areas of the Kingdom were Ager, the southern Cathedral and the slums. Up to half of the population died in these areas, allowing the nobles to increase their control.
Ager was later part of the Holy Oren Empire.