+A **federation** is a political entity characterized by a union of partially self-governing states or regions under a central [Federal Government](/wiki/federal_government). This structure balances shared rule for common interests with regional self-rule for distinct identities, often established by a [Constitution](/wiki/constitution) that defines the division of powers.
+## See also
+- [Unitary State](/wiki/unitary_state)
+- [Confederalism](/wiki/confederalism)
+- [Sovereignty](/wiki/sovereignty)
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