The Crusades should be placed in the high school curriculum because of the many crusades that happened, the many people that were involved in the crusades, and the failure of the crusaders.
There were many crusades that happened.
In total there was at least 7 crusades. Throughout the crusades many wars and battles happened.
The many people that were involved in the crusades.
Many important army leaders and generals were important to the crusades. During the third crusade Richard the Lionheart played a major role in defeating the Muslims.
The failure of the crusades.
The crusades ended up to be a complete failure. At first the crusades were focused on taking back the holy lands. But, at the end they were just a whole bunch of raids and pillaging.