Invasi Rus' Kiev oleh Mongol dilancarkan pada abad ke-13. Selama peristiwa ini, bangsa Mongol menghancurkan beberapa kota, termasuk Ryazan, Kolomna, Moscow, Vladimir dan Kiev.[4]
Invasi Mongol dimulai dengan meletusnya Pertempuran Sungai Kalka pada Mei 1223. Pertempuran tersebut berhasil dimenangkan oleh bangsa Mongol, tetapi mereka lalu mundur dari wilayah Rus' Kiev. Kemudian Batu Khan melancarkan invasi besar-besaran dari tahun 1237 hingga 1240. Setelah kematian Ögedei Khan, invasi ini dihentikan. Meskipun begitu, semua kepangeranan Rus' dipaksa tunduk kepada Mongol dan menjadi bagian dari wilayah Gerombolan Emas.
↑de Hartog, Genghis Khan: Conqueror of the World, pp. 165–66: notes that contemporary Mongol sources describe Batu as invading with 12-14 tumens, which would give him a nominal total of 120,000-140,000 men. However, the author also notes that tumens were often at less than full strength.
↑Fennell, John. "The Crisis of Medieval Russia: 1200-1304." London, 1983. Page 85. Excerpt: "If we assume that each of the larger cities could field, say, between 3,000 and 5,000 men, we can arrive at a total of about 60,000 fighting troops. If we add to this another 40,000 from smaller towns and from the various Turkic allies in the Principality of Kiev, then the total coincides with the 100,000 estimated by S.M. Solov'ev in his History o Russia. But then this is only a rough estimate of the potential number. We have no idea how many, towns and districts actually mustered troops- for instance, it seems highly unlikely that Novgorod sent any at all. Certainly none came to help their outpost at Torzhok. Perhaps then half or a quarter - or even a smaller fraction- of the total was the most the Russians could muster."
↑Boris Rybakov, Киевская Русь и русские княжества XII-XIII вв. (Kievan Rus' and Russian Princedoms in 12th and 13th Centuries), Moscow: Nauka, 1993. ISBN5-02-009795-0.
