He would invade the Kingdom of Jerusalem again in September 1183 .
The tireless Saladin spent the next twelve months campaigning in Syria and Mesopotamia , adding Aleppo and a number of other cities to his growing empire .
Saladin would invade the Kingdom of Jerusalem again in September 1183 .
The tireless Saladin spent the next twelve months campaigning in Syria and Mesopotamia , adding Aleppo and a number of other cities to his growing empire .