The world's largest island, Greenland is about 81% ice-capped. Vikings reached the island in the 10th century from Iceland; Danish colonization began in the 18th century and Greenland was made an integral part of Denmark in 1953. It joined the European Community (now the European Union) with Denmark in 1973 but withdrew in 1985 over a dispute over stringent fishing quotas. Greenland was granted self-government in 1979 by the Danish parliament. The law went into effect the following year. Denmark continues to exercise control of Greenland's foreign affairs.