From Russia with love!
Mongolian Invasion
Battle at Kalka.
First conflict 
between ancient Russia and Mongols was in 1223, when 
Mongolian army of 30.000 people 
came to 
Black sea steppes 
after defeating Alans and Polovtsy. Polovtsy asked 
Russian princes for help. And the united army of the 
three strongest 
Russian princes: Mstislav Romanovich of 
Kiev, Mstislav 
Svyatoslavich of Chernigov and Mstislav Metislavich of Galich, began the 
campaign against 
Mongolian tribes.
On May 31, 1223 at the battle on Kalka 
river (near the 
Azov sea) 
Russian-Polovtsy army was defeated because of uncoordinated 
actions. Six 
Russian princes were killed, three princes (including the prince of Kiev) were captured and then brutally killed. Thus, 
Russia for the first time experienced the 
military power of 
Mongolian Horde.
Lots of Russian there bro! Whoop!