Who had the crusades?

The crusades were a religiously inspired initiative of Pope Urban II. They were a series of religiously justified campaigns against the Islamic populations of the Middle East, in particular the regions around Jerusalem. The crusades met varying levels of success over their lifespan (roughly the 11th-13th centuries) with the First Crusade being widely considered the most successful. I recommend Geoffrey Hindley's A Brief History of The Crusades: Islam and Christianity in the Struggle for World Supremacy, as it provides a good outline of the first few crusades in a fairly laid back format. If you want more information please feel free to message me.

Hope that helps!