Chuuk tro͝ok, trŭk [key], state (1990 est. pop. 48,853), c.39 sq mi (100 sq km), Federated States of Micronesia, W Pacific, in the E Caroline Islands. One of four states comprising the Federated States of Micronesia, Chuuk consists of c.55 volcanic islands surrounded by an atoll reef and many islets. Centrally located, it is the country's most populous state. The chief products are copra and dried fish. During World War II, Chuuk was the site of an important Japanese naval base. In the 2010s there was support for Chuuk independence among some inhabitants, but a referendum planned by the state government for 2015 was not held.

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