The Treaty of Arnswalde was signed on 1 April 1269 between three Brandenburgian margraves, the Ascanians John II, Otto IV and Conrad, and Duke Mestwin II of Pomerelia (Mściwój II) in Arnswalde (then a fortified place in the Brandenburgian New March, now Choszczno, Poland).
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The war against Brandenburg ended in 1273 with a treaty (possibly signed at Drawno Bridge), in which Brandenburg returned Gdańsk to Mestwin while he paid feudal homage to the margraves for the Lands of Schlawe and Stolp.
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