Island, Lesser Sunda Islands, south-central Indonesia. Its irregular coastline includes Bima Bay, one of the best harbours in Indonesia. The island, with an area of 5,965 sq mi (15,448 sq km), is largely mountainous. Its highest point is volcanic Mount Tambora (9,354 ft [2,851 m]), which erupted in 1815, killing 50,000 people. Sumbawa was once part of the Majapahit empire. In 1674 the Sumbawanese nobility signed agreements that gave the Dutch East India Company some power over the island; the Dutch gained direct control in the early 20th century. Sumbawa was occupied by the Japanese during World War II and became part of independent Indonesia in 1950. Agricultural products include rice, corn (maize), coffee, and copra.
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Historical evidence indicates that people on Sumbawa island were known in the East Indies for their honey, horses, sappan wood for producing red dye, and sandalwood used for incense and medications. The area was thought to be highly productive agriculturally.
Sumbawa has historically had two major linguistic groups who spoke languages that were unintelligible to each other. One group centered in the western side of the island speaks Basa Samawa (Indonesian: Bahasa Sumbawa) which is similar to the Sasak language from Lombok; the second group in the east speaks Nggahi Mbojo (Bahasa Bima). The kingdoms located in Sumbawa Besar and Bima were the two focal points of Sumbawa. This division of the island into two parts remains today; Sumbawa Besar and Bima are the two largest towns on the island, and are the centers of distinct cultural groups that share the island. The official estimate of population as at 2005 was 1,219,590.