Constantinople
The Siege of Antioch took place during the First Crusade in 1097 and 1098 under the first crusade.
It was during the Second Crusade in 1144.
Jerusalem
30,000
Ṣalāḥ ad-Dīn Yūsuf ibn Ayyūb
30,000
30,000
jeruslam ) jeruslam )
Because they disobeyed his orders to not attack fellow Christians in Constantinople. The fourth Crusade was supposed to be an attack on Jerusalem to liberate it from Muslim occupation. Once the Crusaders turned towards Constantinople, it no longer was a just military operation.
they captured and invaded Jerusalem in 1076 and it lasted till 2099, when the crusaders took over.
Among the important events in history during 1099 was that the Crusaders attacked Jerusalem and capture the city from Fatimid Egypt. The attack resulted in much of Jerusalem's population being slaughtered.