As a leper, Baldwin had no children and could not be expected to rule much longer, so the focus of his succession passed to his sister Sibylla and his younger half-sister Isabella. Baldwin and his advisors recognised that it was essential for Sibylla to be married to a Western nobleman in order to access support from European states in a military crisis; while Raymond was still regent, a marriage was arranged for Sibylla and William of Montferrat, a cousin of Louis VII of France and of Frederick Barbarossa, Holy Roman Emperor. It was hoped that by allying with a relative of the western emperor, Frederick would come to the kingdom's aid. Jerusalem looked again towards the Byzantine Empire for help, and Emperor Manuel was looking for a way to restore his empire's prestige after his defeat at the Battle of Myriokephalon in 1176; this mission was undertaken by Raynald of Châtillon. After William of Montferrat arrived in 1176, he fell ill and died in June 1177, leaving Sibylla widowed and pregnant with the future Baldwin V. Raynald was then named regent.