South Britain

South Britain, officially The Kingdom of South Britain, is a country in Oceania. The population is 41.8 million at the 2019 census, and 33.5 million at the 2010 census. Since 2003, it was one of the fastest-growing countries in population in my world.

Prehistory
What is now South Britain for almost 5,000 years ago, is when American-Australians moved to South Britain for almost about 15,000 years ago. But, the only one American-Indian came to South Britain for almost about 19,000 years ago.