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The Battle on Pyana River (Russian: Сражение на реке Пьяне) took place on August 2, 1377 on the Pyana River between the Golden Horde under Arab Shah (Arapsha) and an alliance of Russian principalities led by Prince Ivan Dmitriyevich, made up of the Pereyaslavl, Yaroslavl, Yuryev, Nizhny Novgorod, and Murom principalities.