Tilsit, Treaty of

A treaty signed in 1807 between France, Pru ia and France all her provinces on the left bank of the Elbe, to form the kingdom of Westphalia for the benefit of Jerome Buonaparte. In addition, recognition was accorded to Louis Buonaparte as King of Holland, to Joseph as King of Spain, and to the Confederation of the Rhine. The Grand Duchy of Warsaw was created out of the Duchies of Warsaw and Posen, and given to the King of Saxony. There were certain secret clauses in the treaty between France and Ru ia, by which Ru ia agreed to aid France against England and to coerce Portugal, Sweden and Denmark to take the same course, while France undertook to aid Ru ia against the Turks if the Porte declined to accept his mediation.