The Republic of Indonesia is a group of 3000 islands in south east Asia. They have a total area of 1,919,440 km2. The climate is tropical; hot and humid but more moderate in the highlands. The terrain is comprised mostly of coastal lowlands; the larger islands have interior mountains. Natural resources are crude oil, tin, natural gas, nickel, timber, bauxite, copper, fertile soils, coal, gold, silver. The religion is 88% Muslim, 6% Protestant, 3% Roman Catholic, 2% Hindu and 1% others. The official language is Bahasa Indonesia (a modified form of Malay), Javanese, Sundanese with English and Dutch the leading foreign languages spoken and several hundred tribal languages also spoken. A former Dutch colony, Indonesia declared itself independent in 1945, and became independent following a war which lasted until 1949. Research Indonesia