Dictionary
commonwealth
a group of countries with political or economic connections
The 89-year-old said he would not seek compensation from the commonwealth because he wants to spend his final years in peace.
the Commonwealth (formally the British Commonwealth) is an organisation of about 50 countries that were once part of the British empire (=a group of countries consisting of Great Britain and its possessions, dominions, and dependencies)
Rwanda was admitted to the Commonwealth in 2009.