Sack of Chernigov

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You can help expand this article with text translated from the corresponding article in Russian. (June 2019) Click [show] for important translation instructions. View a machine-translated version of the Russian article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 1,238 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Russian Wikipedia article at [[:ru:Оборона Чернигова]]; see its history for attribution. You may also add the template {{Translated|ru|Оборона Чернигова}} to the talk page. For more guidance, see Wikipedia:Translation.

The Mongol siege , capture and sack of Chernigov, capital of the Chernigov Principality, occurred on 18 October 1239 during the westward expansion of the Mongol Empire. It was part of the 1237–1242 Mongol invasion of Kievan Rus'.