Interracial marriage
From AD 839, Viking Varangian mercenaries who were in the service of the Byzantine Empire, notably Harald Sigurdsson, campaigned in North Africa, Jerusalem and other places in the Middle East during the Byzantine-Arab Wars. They interbred with the local population as spoils of warfare or through eventual settling with many Scandinavian Viking men taking Arab or Anatolian women as wives. There is archaeological evidence the Vikings had established contact with the city of Baghdad, at the time the center of the Islamic Empire, and connected with the populace there. Regularly plying the Volga with their trade goods (furs, tusks, seal fat, seal boats and notably female slaves; the one period in the history of the slave-trade when females were priced higher than males), the Vikings were active in the Arab slave trade at the time. These slaves, most often Europeans that were captured from the coasts of Europe or during war periods, and sold to Arabic traders in Al-Andalus and the Emirate of Sicily.
History of Europe
The Viking Age, a period of migrations of Scandinavian peoples, occurred from the late 8th century to the middle 11th century. The Normans, descendants of the Vikings who settled in Northern France, had a significant impact on many parts of Europe, from the Norman conquest of England to Southern Italy and Sicily. The Rus' people founded Kievan Rus', which evolved into Russia. After 1000 the Crusades were a series of religiously motivated military expeditions originally intended to bring the Levant back under Christian rule. The Crusaders opened trade routes which enabled the merchant republics of Genoa and Venice to become major economic powers. The Reconquista, a related movement, worked to reconquer Iberia for Christendom.