The Eighth Crusade was launched in 1270 by King Louis IX of France. Charles of Anjou, brother of Louis suggested the taking of Tunis first, thus taking command of the ports.
It didn’t go as planned, and Louis lost his life on the 25th August, beneath the walls of Tunis in North Africa, from diseased drinking water. On the 30th October, the siege of Tunis was abandoned, in an agreement with the Sultan, as many were struck down by the disease.
The crusade hadn’t been a complete failure, for an agreement was made, whereby Christians gained free trade with Tunis, and Monks and Priests were permitted to reside in the city.
(Image) Eighth Crusade: Wikipedia