On the eve of the Mongol invasion of Hungary in 1241 in order to defend the country as successfully as possible the Hungarian King Bela IV welcomed Cumans to his state (1239). They had previously clashed with the Mongols in the area of the Black Sea region of steppes and they were threatened by them. However. after the murder of their khan Kotyan. https://yeswellneses.shop/product-category/ppe-supplies/