Batu Khan The siege of Moscow in January 1238 was part of the Mongol invasion of Kievan Rus'.

After the destruction of Ryazan on 21 December 1237, Grand Prince Yuri II sent his sons Vsevolod and Vladimir with most of Vladimir-Suzdal army to stop Mongol invaders at Kolomna.

There, the Suzdalian army was defeated, and survivors scattered and fled North, to Vladimir and Moscow.

At the time Moscow was but a fortified village, a trading post "on a crossroads of four rivers".

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