In 866, after issuing a call for assistance to fight the Saracens, he routed these invaders, but could not follow up his successes owing to the lack of a fleet.
866年，在發出援助他打擊撒拉遜人的呼籲後，他終能將這些入侵者撃退，但是由於缺乏艦隊，他無法取得進一步的成功。