Fragmentation of the Kievan Rus'
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Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states of the Kievan Rus' were de facto independent.
Chronology
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January 1133: Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states of the Kievan Rus' were de facto independent.
January 1133: The Principality of Novgorod-Seversk was formed as part of the Chernigov principality in 1097. Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states were de facto independent.
January 1133: After the weakening of the Rus' state, the Byzantine Empire, under the rule of Emperor John II Komnenos, took control of southern Crimea in 1132.
January 1133: As a result of the fragmentation of the Rus', effective rule of Grand Princes of Kiev was gradually reduced to central regions of Kievan Rus', thus forming a reduced princely domain, known as the inner Principality of Kiev. Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states were de facto independent.
January 1133: Territorial change based on available maps.
