Eighth Crusade
Also called: Crusade of Louis IX against Tunis
Louis IX set out again and attacked Tunis in North Africa, but disease swept his camp, the king died and the crusade ended.

Maître de Troyes (atelier) · Public domain · Source
When the Mamluk sultan Baybars took Antioch (1268) and other crusader strongholds, Louis IX set out once more. In July 1270 he landed not in the Holy Land but at Carthage outside Tunis; explanations range from hopes that the sultan of Tunis would convert to the interests of his brother Charles of Anjou, King of Sicily.
In the summer heat disease, probably dysentery, swept the camp, and Louis died on 25 August. Charles, arriving late, made a treaty with Tunis that brought an indemnity and trading privileges, and withdrew in November.