Saladin 1: An Arabian Knight
This campaign covers three decades in the life of Ṣalāḥ ad-Dīn Yūsuf ibn Ayyūb, known in the West as Saladin, from when he was an unknown, albeit connected, man, through his campaigns to drive the infidel from the Holy Land, up until the Siege of Acre, at the start of the Third Crusade, several years before his death.
Quite easy. Just follow the instructions. You have to go down to the north end of the map in order to get into the city. There are very few opponents along the way. Once you made it to the wonder you receive additional troops. Leave the city and head to the east. Vaporizing the enemy town center should be no problem with your siege equipment.