First Eisinese Invasion

"'The Eisinese... Demons, the whole lot of them. You will find no other people that ride the horse as masterfully as them' - Count Ulgried Rotem"The First Eisinese Invasion, known colloquially as the Golden War, was the first of a series of conflicts waged by the Rider-King, Altaic the Gilded. Erdesia was no stranger to bloody conflicts, but the Golden War was unlike anything the Eastern Erdesians had ever seen before. For centuries, the frontier countries that border the Bloody Plains stood vigilant against the raids committed by their barbaric neighbours, but those attacks were mostly conducted by roving bands of men seeking to earn easy money. However, under the leadership of Altaic, the Eisinese expanded faster than ever before -- not for loot, but to build an empire.

Millions died before the leaders of each side could broker a peace agreement. Starvation gripped the land, and the horselords that were once regarded as barbarians were feared by even the greatest of kings

Background
"'The sky shall sing of our triumph' - Altaic Borjigin"The winter equinox was upon the Eisinese. On that holy day, families would gather around the camp fire to tell their tales. Some told comedies, while the sages spoke of ancient men slaying mighty beasts. Amidst the crowd was a young man, gifted with the power of magic. The arcane arts was highly coveted among the Eisinese, so he was able to use his powers to gain a comfortable position of power in his tribe. However, that year, the aura felt different. Suddenly, Altaic was struck by a scorching fever, forcing his entourage to place him on his bed. When he woke up, he spoke to his men about a rich land in the east, where the land flowed with milk and honey. He left his yurt to tell his tribe about the dream he experienced. After he retold his tale, the men of the tribe gathered before him and pounded their shields in honour of the man that stood before them.

Hours later, a sacrifice was made to the Sky Father. In front of him lay a white filly, whose eyes were covered by a thin layer of cloth. Altaic, unfazed, pierced through the horse's underdeveloped chest and pulled out its heart, raising the flesh into the air for all to see. He took one bite from the heart before throwing it into the hearth of the fire. From there, he set out to unite all of the scattered Eisin tribes throughout the Bloody Plains.

Confrontation with the East
Altaic's khanate expanded evermore towards the eastern shorelines of Erdesia.