china has gained independence.
Brazil is an independent country. The Independence of Brazil is celebrated on September 7.
All those islands belong to the country of Canada.
Suriname doesn't belong to any country. It's an independent country. The Netherlands granted independence to Suriname on November 25, 1975.
The US is an independent country. It has been for over 200 years. It fought for its independence, just as any county would have done. No country wants to belong to another country, so the US fought for independence and got it. Since then it has developed and enlarged.
Indonesia used to belong to the Dutch. It was called the Dutch East Indies until gaining independence in 1945.
Colombia
Denmark.
Oregon didn't belong to anyone. It was a territory.
It has been independent since May 14, 1948.
Mexico.
Spain