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The Industrial Revolution: The Steam Engine (1:09)
By the late 1700s, the coal powered steam engine was widely used in English factories. Its operation, based on valve-piston action, was a great advancement for its time, further increasing industrial productivity.
Napoleon: The French Revolution and the Reign of Terror (2:07)
Learn more about the French Revolution in this video.
The Medieval Era: Life in a Feudal Castle (3:27)
The castles of the Middle Ages were almost impenetrable fortresses for the enemy, but inside they reveal cold, empty rooms lacking in every comfort.
The Medieval Era: Feudal Hierarchy (1:51)
The lords of the castles ruled over the peasants, who worked the land for protection in times of war. Medieval armies were lead by knights, who were skilled warriors often given diplomatic impunity.

