Chernihiv Empire (1198 – 1223) Nicholas Zharkikh Olgovychs princes at the beginning of the 13th century The first war for the Galician heritage (1201 – 1203) Second war for the Galician heritage (1205 – 1206) The struggle against the oppression of the Olgovychs (1206 – 1208) The Galician catastrophe of the Igorovychs (1209 – 1211) The end of Vsevolod Chermny (1210 – 1212) Chernihiv and the Battle of Kalka (1215-1223)