The Battle of Blue Waters was a medieval battle fought at some time between 24 September and 25 December 1362 near the Syni Vody of the Southern Bug

Southern Bug

The Southern Bug, also called Southern Buh), is a river located in Ukraine. The source of the river is in the west of Ukraine, in the Volyn-Podillia Upland, about 145 km from the Polish border, and flows southeasterly into the Bug Estuary through the southern steppes...

 between the armies of the Grand Duchy of Lithuania

Grand Duchy of Lithuania

The Grand Duchy of Lithuania was a European state from the 12th /13th century until 1569 and then as a constituent part of Polish-Lithuanian Commonwealth until 1791 when Constitution of May 3, 1791 abolished it in favor of unitary state. It was founded by the Lithuanians, one of the polytheistic...

 and the Golden Horde

Golden Horde

The Golden Horde was a Mongol and later Turkicized khanate that formed the north-western sector of the Mongol Empire...

.

Taking advantage of internal disorders within the Golden Horde caused by deaths of Khans Jani Beg

Jani Beg

Jani Beg was a khan of the Golden Horde from 1342 to 1357, succeeding his father Uzbeg Khan.After putting two of his brothers to death, Jani Beg crowned himself in Saray-Jük. He is known to have actively interfered in the affairs of Russian principalities and of Lithuania...

 and Berdi Beg

Berdi Beg

Berdi Beg was Khan of the Golden Horde from 1357 till 1359, succeeding his father Jani Beg of whom Berdi Beg may have been behind the poisoning. His reign was marked by turmoil and political murders, and in 1359 he was assassinated by his brother Qulpa, after which the Golden Horde fell apart...

, Grand Duke Algirdas

Algirdas

Algirdas was a monarch of medieval Lithuania. Algirdas ruled the Grand Duchy of Lithuania from 1345 to 1377, which chiefly meant monarch of Lithuanians and Ruthenians...

 organized a campaign into Tatar lands. In 1363 Algirdas marched between lower Dnieper and Southern Bug

Southern Bug

The Southern Bug, also called Southern Buh), is a river located in Ukraine. The source of the river is in the west of Ukraine, in the Volyn-Podillia Upland, about 145 km from the Polish border, and flows southeasterly into the Bug Estuary through the southern steppes...

.

Lithuanians

Lithuanians

Lithuanians are the Baltic ethnic group native to Lithuania, where they number around 2,765,600 people. Another million or more make up the Lithuanian diaspora, largely found in countries such as the United States, Brazil, Canada, Colombia, Russia, United Kingdom and Ireland. Their native language...

 and Ruthenians

Ruthenians

The name Ruthenian |Rus']]) is a culturally loaded term and has different meanings according to the context in which it is used. Initially, it was the ethnonym used for the East Slavic peoples who lived in Rus'. Later it was used predominantly for Ukrainians...

 won a decisive victory over 3 local noyans of the Jochid Khan Murad. The victory brought the city of Kiev

Kiev

Kiev or Kyiv is the capital and the largest city of Ukraine, located in the north central part of the country on the Dnieper River. The population as of the 2001 census was 2,611,300. However, higher numbers have been cited in the press....

 and a large part of present-day Ukraine

Ukraine

Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...

, including scarcely populated Podolia

Podolia

The region of Podolia is an historical region in the west-central and south-west portions of present-day Ukraine, corresponding to Khmelnytskyi Oblast and Vinnytsia Oblast. Northern Transnistria, in Moldova, is also a part of Podolia...

 and Dykra

Dykra

Dykra was the southern territory of the medieval Grand Duchy of Lithuania near the Black Sea, presently shared between Ukraine and Moldova....

, under the control of the expanding Grand Duchy of Lithuania. The duchy also gained access to the Black Sea

Black Sea

The Black Sea is bounded by Europe, Anatolia and the Caucasus and is ultimately connected to the Atlantic Ocean via the Mediterranean and the Aegean seas and various straits. The Bosphorus strait connects it to the Sea of Marmara, and the strait of the Dardanelles connects that sea to the Aegean...

. Algirdas left his son Vladymir

Vladimir Olgerdovich

Vladimir Olgerdovich was a son of Algirdas, Grand Duke of Lithuania, and his first wife Maria of Vitebsk. He was Grand Prince of Kiev from 1362 to 1394. His sons Ivan and Alexander started the Belsky and Olelkovich families....

 in Kiev. Kiev was already under semi-Lithuanian control since the Battle on the Irpen' River

Battle on the Irpen' River

The Battle on the Irpin River occurred in early 1320s between the armies of Gediminas, the Grand Duke of Lithuania, and Prince Stanislav of Kiev, allied with Oleg of Pereyaslavl' and Roman of Bryansk. On the small Irpin River about south west of Kiev, Gediminas resoundingly defeated Stanislav and...

 in early 1320s. After taking Kiev, Lithuania became a direct neighbor and rival of the Grand Duchy of Moscow

Grand Duchy of Moscow

The Grand Duchy of Moscow or Grand Principality of Moscow, also known in English simply as Muscovy , was a late medieval Rus' principality centered on Moscow, and the predecessor state of the early modern Tsardom of Russia....

. Podolia was trusted to Algirdas' nephews and commanders during the battle Aleksander, Yuri, Konstantin, and Fedir

Fyodor Koriatovych

Fyodor Koriatovych was a Ruthenian prince of Lithuanian origins, son of Karijotas, Duke of Navahrudak, and grandson of Gediminas, Grand Duke of Lithuania. Fedir inherited Navahrudak Castle from his father and after his other brothers died ca. 1389, became ruler of all Podolia as a result of the...

, sons of Karijotas.