Answer:
Step-by-step explanation:
The Black Death, a medieval pandemic that was probably a bubonic plague, is generally associated with Europe. This is not surprising, as it killed about a third of the European population in the 14th century. However, the bubonic plague actually began in Asia and devastated many areas of that continent.
In 1344, the Golden Horde decided to recapture the Crimean port city of Kaffa from the Genoese - the Italian merchants who took the city in the late 1200s. The Mongols under Jani Beg instituted a siege, which lasted until 1347 when from the east they brought the plague on the Mongol lines.

An Italian lawyer, Gabriele de Mussis, noted what happened next: "The whole army was affected by a disease that overwhelmed the Tartars (Mongols) and killed thousands and thousands every day." He goes on to accuse the Mongol leader of "ordering the bodies to be placed in the catapult and entering the city in the hope that the intolerable stench will kill everyone inside."
The Mongols are spreading the plague to Kaffa