Summary of Islamic/Roman world interactions prior to the Crusades(0:28-0:53)

Pope Urban II urges a war to aid Byzantine Empire against the Muslims(0:53-1:25)

Crusade 1, siege of Jerusalem, establishment of Christian kingdoms (2:50-3:50)

Crusade 2 (3:54-4:15)

Crusade 3, Response to Salah al-Din, Richard the Lionheart (4:17-5:36)