Respuesta :

There would be many crusades which failed. Which lead to the heavy population of once Roman christians in the middle east becoming converted to Islam along with many upper African country's accepting Islam as their faith.

Answer:

The Crusades

Explanation:

At the end of the 11th century, the Byzantine Empire asked the Catholic Church for help to stop the invasion of the Seljuk Turks that were threatening its Eastern border in Anatolia and the Middle East. In 1095, the Pope Urban II used this occasion to call to all the European Christianity to begin a holy Crusade to "recover" the Holy Land, that at that time was under the rule of the Islamic Caliphate. In the year 1098, Jerusalem fell at the hands of the Crusader troops that established the Christian Kingdom of Jerusalem. It was the beginning of a series of crusades and military conflicts between European Christians and Muslim Saracens in the Middle East, that lasted for two hundred years at least, with the loss of the last Crusader kingdom of Acre in 1291.