The Human-Demon War

The Human-Demon War was a war between the Demons of The Demon Kingdom and Humans of The Holy Empire of Aria.

When adventuring Demons were traveling near a human mine of The Holy Empire of Aria at night, they were mistaken for monsters and were killed by the miners.

This caused a conflict between their countries, as The Demon Kingdom put the entire blame on The Holy Empire of Aria, which brew more and more hate to each other until they went into a war.

The war lasted for 2 years before it came to stalemate and both species avoided each other for years until the hate cooled down.

Amadeus, who will start the second Human-Demon War, was greatly affected by that war.