This is a Minecraft server with nations and one of the nations is called Avaloria.
Right now that nation is super lonely and basically only has one player in it. They are looking for more people to join and help grow the nation.
The server is called Nation Craft and it runs on version 1.21.10. You can join the server and then choose to be part of Avaloria if you want a nation that is just starting out.
If you want a place where you can actually make a difference in a small nation then this looks pretty cool.
