The pandemic was reportedly first introduced to Europe during the siege of the Genoese trading port of Kaffa in Crimea by the Golden Horde army of Jani Beg in 1347
So in addition to killing 50 million by war and conquest, the Golden Horde killed 50 million by disease.
https://en.wikipedia.org/wiki/Black_Death
So in addition to killing 50 million by war and conquest, the Golden Horde killed 50 million by disease.