An earthquake caused the plague to be released in Central Asia. The area was under control of the Mongol Khanate.
The spread of the plague killed many Mongol Troops that were surrounding the port of Kaffa. The leader of their troop Kipchak Khan catapulted the dead bodies over the city walls.
The people of Kaffa board on ships and leave the city to try and escape the plague.
The plague had been carried by the East trading ships. Boccaccio said the symptoms of the plague were "The first signs of the plague were lumps in the groin and armpits After this, livid black spots appeared on the arms and thighs and other parts of the body. Almost all died within three days”. Only after this did the people start calling the plague the BLACK DEATH.