Denian Archipelago

The Denian Archipelago is an archipelago in the middle of Atlantic Ocean that consists of 10 countries: Denia, Yuhrio, Uryia, Xana, Atlantica, Pacifica, Nimre, Juromex, Nurio, and Yeyaheru. 9 million years ago, a whopping 9.7 earthquake struck Denian continent, making it an archipelago as some lands sunk.

Prehistory: 28th century BC-3 AD
About 34 million years ago, the Denian continent broke up from the South American continent. 9 million years ago, a whopping 9.7 earthquake struck Denian continent, making it an archipelago as some lands sunk. It also changed some landscapes (like made another volcano, Mount Orix). It was found by ancient North American/South American tribes in 28th century BC.

Denian Empire rules: 3 AD-1950
On 3 AD, descendants of the North American/South American tribes with the help of Roman Empire decided to established its own empire. It conquered the archipelago, and thus establishing the Denian Empire. It is the longest-lived empire in the world.

During the American Revolution, Denian Empire decided to help the colonists. This angered the British Empire, starting the Denian-British War. However, due to the American Revolution, the British Empire was defeated.