Summer Night Palace, though not sounding like a magnificent building, was actually established by the former Royal Family of Sidney. At that time, it was the most resplendent palace in the Western Lands, and the former Royal Family was nearly on the path to unifying the Western Lands.
Unfortunately, the owner of such a grand and magnificent building first faced a civil war due to the mysterious death of the Emperor, followed by a baffling epidemic.
After being severely weakened, these lands faced an invasion from the Northern Kingdom, resulting in the loss of the Savoy region and the Lowland Netherland region.
The former became de facto independent, while the latter turned into an alliance between Druids and Treants.
This invasion sowed the seeds of enmity between the Northern Kingdom and the Sidney Union.
It was not until the assassination of the Saintess that the No-name Prime Creator voluntarily stepped forward to mediate the dispute.
The war then received its full stop.