Battle fought at the Indust river between Khwarazm and the Mongols (1221 AD)

1221 battles involving the Mongol Empire

1221 failed Estonian siege of the Danish stronghold in the Livonian Crusade

Khwarezmian Empire vs Mongol Empire, 1221

1221 Mongol invasion of Khwarezmia and Eastern Iran

1221 battle in Japan

Mongol campaign in 1220–1221