The Sixth Crusade took place from 1228 to 1229 and was led by the Holy Roman Emperor Frederick II. Unlike previous crusades that involved large armies, this campaign was notable for its diplomatic approach. Frederick negotiated directly with the Muslim leader Al-Kamil, the Sultan of Egypt, to regain control of Jerusalem and other territories. As a result of these negotiations, Frederick managed to peacefully acquire Jerusalem, along with other key cities, without significant military conflict. This achievement was marked by the Treaty of Jaffa, which allowed Christians to access holy sites. However, the peace was temporary, and tensions remained high in the region.