[archy]

During the years of the "black death" didn't armies use bodies of those who died from the plague as projectiles from catapults?

Technically, no. Body parts, maybe.

Catapultum:

Trebuchets:

Arbalest:

See following, to describe the use of a counterweighted trebuchet to throw a projectile of circa 100 pounds a distance of 200 meters, probably sufficient for the sort of projectile you suggest.

Catapultam habeo. Nisi pecuniam omnem mihi dabis ad caput tuum saxum immane mittam!

[Tijeras_Slim]

You forgot El Launcho Grande from Moriarty NM, which tipped the balance of power in the great pumpkin wars of the late 90's.