A 20,000 strong army under William of Modena crossed the frozen sea while the Saaremaa fleet was icebound, in January 1227, and the Livonian Order conquered the last indigenous stronghold on the nearby small island of Muhu.
A 20,000 strong army under Papal legate William of Modena crossed the frozen sea while the Saaremaa fleet was icebound, in January, 1227. In 1227 the Sword Brethren conquered the last indigenous stronghold on the small Estonian island of Muhu.