The greater metropolitan area of Jakarta is also known as Jabodetabek. This megacity is home to over 30 million people, and combines Jakarta, Bogor, Depok, Tangerang and Bekasi. The city was established in the fourth century. The Kingdom of Sunda (669 -1579) grew with the engine of this important trading port. Later it was the de facto capital of the Dutch East Indies. Like the British East India Company, European colonisation started out as a competitive, nationalistic, commercial endeavour (Mercantilism). Japan's World War II occupation (1942) dismantled much of the colonial state, and after Japan's defeat, Indonesian independence was declared in 1945. As an economic magnate, Jakarta attracts migrants with a 1961 census showing only 51% of the population born in the city. The Betawi people (native Jakartans) are a creole group formed by the various immigrant groups (Indonesian, Chinese, Arab, European) and make up just over a quarter of the population.