confederation
You are probably thinking of the League of Nations (an organization which has been replaced by the United Nations) but in any event, if nations league together, they form an alliance, or a cooperative group.
alliance, union, association, league, organization, brotherhood, sisterhood, federation
Union league
Union League
Union League
Union League
The official definition for the word confederation is "an organization that consists of a number of parties or groups united in an alliance or league."
Welsh Alliance League was created in 1984.
Football League Youth Alliance was created in 1997.
it was the league of women voters.
it was the league of women voters.
union league If they promoted self-defense, I would say the Black Panthers.