Suzerainty

A suzerain (, from Old French "above" + "supreme, chief") is a person, state or polity who has supremacy and dominant influence over the foreign policy and economic relations of another subordinate party or polity, but allows internal autonomy to that subordinate. Where the subordinate polity is called a vassal, vassal state or tributary state, the dominant party is called the suzerain. The rights and obligations of a vassal are called vassalage, and the rights and obligations of a suzerain are called suzerainty.