Evidence supports the idea that the Thule (and also the Dorset, but to a lesser degree) were in contact with the Vikings, who had reached the shores of Canada in the 11th century. In Viking sources, these peoples are called the "Skrælingjar". Some Thule migrated southward, in the "Second Expansion" or "Second Phase". By the 13th or 14th century, the Thule had occupied an area inhabited until then by the Central Inuit, and by the 15th century, the Thule replaced the Dorset. Intensified contacts with Europeans began in the 18th century. Compounded by the already disruptive effects of the "Little Ice Age" (1650–1850), the Thule communities broke apart, and the people were henceforward known as the Eskimo, and later, Inuit.