King Andrew II of Hungary had married…
May 1217 CE
King Andrew II of Hungary had married Yolanda, the niece of Henry I, the Emperor of Constantinople, in February 1215.
When the Emperor Henry I died on July 11, 1216, Andrew had planned to acquire the imperial throne, but the barons of the Latin Empire had proclaimed his father-in-law, Peter of Courtenay, their emperor.
Andrew has decided nonetheless to fulfill his father's oath and makes preparations for a Crusade to the Holy Land in 1217, one of several foreign misadventures that will prove costly to Hungary.