Answer: federation

AnswerCrossword Clue
FEDERATIONKlingon Empire's foe, with "the"
FEDERATIONLeague
federationa federal government
federationA group of states with a central government but independence in internal affairs
federationAn organization or group within which smaller divisions have some degree of internal autonomy
federationThe action of forming states or organizations into a single group with centralized control