The war between Liang and Lai States began five years ago, in the second year of Shenwu.
At the beginning of this war, only Liang and Lai States were involved.
However, as the war intensified, especially after Liang State deployed 500,000 troops and increased the number of Inborn Grandmasters to five.
With Lai State's strength, they were unable to resist Liang State any longer.
Lai State was merely a small country of two prefectures. After Liang State's invasion, it lost half of its territory, leaving only one prefecture.
Even if they used all their strength, together with civilian workers, they could only muster an army of more than a hundred thousand, far inferior to Liang State.
Lai State did have more Inborn Grandmasters, two of them, to be exact. Their foundation was not bad, but still far worse than Liang State.
Therefore, to protect themselves, Lai State sought assistance from Xu State, bringing this overlord of Xuzhou into the war.