Hmmm L movement of a horse from jumping or flanking OR
“Medieval Siege. So when combatants used corpses as ammunition, these bodies were no doubt intended as biological weapons. Historians know of at least three cases: 1340 - Attackers hurled dead horses and other animals by catapult at the castle of Thun L'Eveque in what is now northern France.” Source: https://www.pbs.org/wgbh/nova/sciencenow/0401/02-hist-01.html#:~:text=Medieval%20Siege&text=So%20when%20combatants%20used%20corpses,what%20is%20now%20northern%20France.
All explained here
https://www.chess.com/forum/view/off-topic/the-sad-tale-of-the-pawn