Sovereign power is formally divided between a central authority and a number of constituent regions so that each region retains some degree of control over its internal affairs.[1]
https://en.m.wikipedia.org/wiki/Federation
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Wikipedia 
FederationSovereign power is formally divided between a central authority and a number of constituent regions so that each region retains some degree of control over its internal affairs.[1]
https://en.m.wikipedia.org/wiki/Federation
HEIGHT 500
Wikipedia