How do we explain the Crusades?

So I was trying to find an explanation to give to someone when they ask about the crusades and why they happened. Why they were done in God’s name and such

Thank you!

The following link should give you some resources for information on the Crusades. If you have any further questions, please contact Catholic Answers directly

Recommended Reading:

The Crusades/Inquisition from a pro-Catholic POV

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