The Viking Age is the period from 793 AD to 1066 AD in European history, especially Northern European and Scandinavian history, following the Germanic Iron Age. It is the period of history when Scandinavian Norsemen explored Europe by its s...

The Crusades were a series of religiously-sanctioned military campaigns waged by much of Latin Christian Europe, particularly the Franks of France and the Holy Roman Empire. The specific crusades to restore Christian control of the Holy Lan...

The Mongol Empire was the largest contiguous empire in world history and for some time was the most feared in Eurasia. It was the product of Mongol unification and Mongol invasions, which began with Temujin being proclaimed ruler in 1206, e...