section_path: History/Medieval
section_name: Medieval
paragraph_text: Medieval
  
  Beginning in the 7th century, Arabs colonized a substantial portion of the Middle East, North Africa, and parts of Asia and Europe. From the 9th century Vikings (Norsemen) such as Leif Erikson established colonies in Britain, Ireland, Iceland, Greenland, North America, present-day Russia and Ukraine, France (Normandy) and Sicily. In the 9th century a new wave of Mediterranean colonisation began, with competitors such as the Venetians, Genovese and Amalfians infiltrating the wealthy previously Byzantine or Eastern Roman islands and lands. European Crusaders set up colonial regimes in Outremer (in the Levant, 1097–1291) and in the Baltic littoral (12th century onwards). Venice began to dominate Dalmatia and reached its greatest nominal colonial extent at the conclusion of the Fourth Crusade in 1204, with the declaration of the acquisition of three octaves of the Byzantine Empire.