Self-Autonmy
Commonwealth
Canada joined the Commonwealth after it became self-governing.
Puerto Rico is an unincorporated, self-governing territory of the United States and styles itself ( in English) as the Commonwealth of Puerto Rico. Its name in Spanish, Estado Libre Asociado de Puerto Rico, is more literally translated to English as "Free Associated State of Puerto Rico."
Yes, Pennsylvania was a self-governed colony.
Denmark has two self-governing possessions.
Self-Autonmy
Domninion
Denmark
Yes.
Australia is both the smallest continent and a self-contained country.
Commonwealth
1867
Greenland is a part of Denmark.
Russia is a self-governing sovereign nation.
Japan is an independent, self-governing nation.
Commonwealth