how did the black death entered the city of caffa
Feodosia It is believed that the devastating pandemic the Black Death entered Europe for the first time via Kaffa in 1347, through the movements of the Golden Horde. After a protracted siege during which the Mongol army under Janibeg was reportedly withering from the disease, they catapulted the infected corpses over the city walls, infecting the inhabitants, in one of the first cases of biological warfare. Fleeing inhabitants may have carried the disease back to Italy, causing its spread across Europe. However, the plague appears to have spread in a stepwise fashion, taking over a year to reach Europe from Crimea. Also, there were a number of Crimean ports under Mongol control, so it is unlikely that Kaffa was the only source of plague-infested ships heading to Europe. Additionally, there were overland caravan routes from the East that would have been carrying the disease into Europe as well.[8]