The Battle of Blue Waters was fought at some time in the autumn of 1362 or 1363 on the banks of the Syniukha River, a left tributary of the Southern Bug, between the armies of the Grand Duchy of Lithuania and Principality of Moldavia against the Golden Horde. The Lithuanians won a decisive victory and finalized their conquest of the Principality of Kiev, while the Moldavians managed to end their dependence on the Golden Horde.