In the 11th century, Pope Urban II directed Christian Europe to conquer the Islamic lands of the Mediterranean, in a religious military campaign known as what?

The First Crusade

Explanation:

Crusades were various religious wars between Christians and Muslims to secure, gain control of places considered to be holy sites(especially Jerusalem) to both religions, The Christan crusade was directed by the Latin Church in the medieval period beginning in the late 11th century(1096 and 1271) to recovery the Holy Land from Islamic rule.

The first crusade started was the first of a number of religious wars initiate over centruies. It strated in 1096 and ended in 1099 in Levant and ‎Anatolia. Pope Urban II directed and mobilze Christian in Europe to conquer the Islamic lands of the Mediterranean after been under Muslim rule for 450 years. After seven weeks of siege, the war ended in the crusaders' favor.