On this day, Xingqin invaded the island of Taras, belonging to Ramerian, starting the Xingqin War.
The Timeline of the Overworld
The Era started by the failed invasion of Hell
The Dominion of Xingqin launched a highly successful military island hopping campaign on the Trelas Island chain, taking three heavily fortified islands in rapid succession.
On the 21st of Flies, Grand Vailia was the first nation to rebel against the Ramerian Empire, setting off almost three months of independence wars of countless minor nations until the dissolvement of the Empire.
On this day, the Ramerian Empire officially ceased to exist and lost all its holdings on the mainland, its military arm continuing to exist in the form of the Ramerian Remnant.