For several centuries, the enthusiasm of the crusaders continued to the point of organizing The Children's Crusade in 1212. The Children’s crusade resulted in masses of children and young teens marching eastward to die or become enslaved by enemy forces. For 200 more years a series of high points and enterprises marked the continuing efforts to regain the Holy Land for the Christian Church and to spread Christianity by force into the rest of the Eastern world. The efforts are often named or numbered in History books as the following:

• The First Crusade (AD1096 - 1099): The People's Crusade or Siege of Jerusalem.

• The Norwegian Crusade (AD1107–1110): Sigurd I of Norway goes on a crusade and defeats Muslims in Spain, the Baleares, and Iberia.

• The Second Crusade (AD 1147 - 1149): The Fall of Edessa.

• The Third Crusade (AD 1189 - 1192): The Fall of Acre and the failure to take Jerusalem back, sometimes called the King’s Crusade.

• The Fourth Crusade (AD 1201 -1204): The Fall of Constantinople. This is often seen as the final breaking point of the Great Schism between the Eastern Orthodox Church and Western Roman Catholic Church.

• The Fifth Crusade (AD 1218 - 1221): The attack on Egypt leads to the establishment of the Franciscan Custody of the Holy Land.

• The Sixth Crusade (AD 1228 -1229): The Retaking of Jerusalem with a treaty allowing Christians to rule over most of Jerusalem, while giving Muslims control of the Dome of the Rock.

• The Seventh Crusade (AD 1248 - 1254), and the Eighth Crusade (AD 1270): Both were disastrous attempts to take more of the East.

• The Ninth and Last Crusade (AD 1291): Deemed a failure thus ending the phase of Middle East Crusading for the Church.

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In areas like Spain, Christians fought Muslims for “la reconquista”, the re-conquest of lands that had once been for the Christians and taken by Muslim in AD 711. In 1492, and after nearly 800 years of rule, Muslims were defeated and pushed out of the land they had called Andalusia. For many Muslims, the loss of Andalusia (Spain) is still felt as a defeat that must one day be reversed.

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At end of the long wars in the Middle East, the Crusaders in Palestine were defeated, and Jerusalem would continue to be fought over between Muslims and Jews to this day. The negative effects of the Crusades can still be seen in the relationships and attitudes towards the Christian world displayed by Muslims today.