Changes

===Decline of Rus'===

===Decline of Rus'===

Feudal fragmentation caused the decline of Kievan Rus' in the 12th century. In 1169 Kiev was sacked by Prince Andrei Bogoliubsky of Vladimir; in 1240 it was virtually destroyed by the [[Mongols]] under Batu Khan. The Principality of Galicia-Volhynia continued as the successor state of Kievan Rus' in what is now Ukraine until the 14th century, when it was annexed by [[Poland]] and [[Lithuania]]. In the 13th and 14th centuries the Ukrainian people developed a distinct culture.

Feudal fragmentation caused the decline of Kievan Rus' in the 12th century. In 1169 Kiev was sacked by Prince Andrei Bogoliubsky of Vladimir; in 1240 it was virtually destroyed by the [[Mongols]] under Batu Khan. The Principality of Galicia-Volhynia continued as the successor state of Kievan Rus' in what is now Ukraine until the 14th century, when it was annexed by [[Poland]] and [[Lithuania]]. In the 13th and 14th centuries the Ukrainian people developed a distinct culture from the other East Slavs but language remained the same.

===Cossacks===

===Cossacks===