Answer:
Constantinople was a Christian city from which the Crusaders marched on Jerusalem.
Step-by-step explanation:
The First Crusade was the first of various campaigns, that endeavored to recover the Holy land called Fore by Pope Urban II at the Council of Clermont in 1095. Urban required a military endeavor, to help the Byzantine domain which had as of late lost the majority of Anatolia to the Seljuq Turks. The subsequent military endeavors of essential Frankish nobles, known as the Princess campaign. recaptured Anatolia as well as went onto overcome the Holy Land.