>Plague cases reported in Mongolia
We're gonna need moar catapults
>One of the first recorded uses of biological warfare occurred in 1347, when Mongol forces are reported to have catapulted plague-infested bodies over the walls into the Black Sea port of Caffa (now Feodosiya, Ukraine), at that time a Genoese trade centre in the Crimean Peninsula. Some historians believe that ships from the besieged city returned to Italy with the plague, starting the Black Death pandemic that swept through Europe over the next four years and killed some 25 million people (about one-third of the population).
https://www.britannica.com/technology/biological-weapon/Biological-weapons-in-history