Mongol Invasion
From Tardis Wiki, the free Doctor Who reference
According to one account, the War Lords incorporated combatants from the Mongol Invasion in the War Games. (PROSE: Doctor Who and the War Games) In the 13th century, the Mongol Empire invaded Europe, the largest invasion the continent had ever seen according to the First Doctor. Following their siege of Kiev in 1240, the Mongols attacked both Poland and and Hungary. (PROSE: Bunker Soldiers)
