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Here are 3 of my ideas for how this could happen. You can add your own
WI 1: henry vi lives longer how does this change the politics of europe?
WI 2: Conrad iv lives longer. How does this change the politics of the Holy Roman Empire Sicily and the levant
WI 3: Conradin curbstomps Charles of Anjou at the Battle of Taglicozo. How does this change the politics of the Holy Roman Empire Sicily and the levant