Near 100 BCE, a displaced group of people from Hesse migrated with their cattle to the shores of the North Sea near the Frisii tribe, occupying the island of Batavia, between the Rhine, Maas, and Waal. Historical records suggest these cattle were black, and the Friesian cattle at this time were "pure white and light coloured". Crossbreeding may have led to the foundation of the present Holstein-Friesian breed, as the cattle of these two tribes from then are described identically in historical records.