Dee ihe na-aga n'ihu maka paragraf a - Mgbe nkewa nke Rus na 1097, Iskorosten nọgidere n'okpuru ikike nke ndị isi Kyivan. Na Disemba 1240 mwakpo ndị Mongol nke Rus', nke Batu Khan duziri, bibiri ma gbaa ọtụtụ obodo na obodo ndị dị na mpaghara Iskorosten ọkụ. Site na 1243 ndị Mongol-Tatars, n'ụdị Golden Horde (akụkụ ọdịda anyanwụ nke alaeze ukwu Mongol) chịrị. Mgbe mmeri ndị Tatar meriri ha n'agha nke Blue Waters
na 1362 (ma ọ bụ 1363) Onye isi Duke nke Lithuania Algirdas jikọtara ala ndị a na Grand Duchy nke Lithuania. Ka e mesịrị, o nyere ha otu n'ime ndị na-agba ịnyịnya ya bụ́ Terekha onye Bryansk maka ijere ya ozi n'ikwesị ntụkwasị obi. Site na 1385, mgbe e guzobere Union nke Krewo, ókèala a nọ n'okpuru mmetụta nke Poland.