Indigenous Guamanians are the Chamorro, who are related to the Austronesian peoples of the Malay Archipelago, the Philippines, Taiwan, and Polynesia. But unlike most of its neighbors, the Chamorro language is not classified as a Micronesian or Polynesian language. Rather, like Palauan, it possibly constitutes an independent branch of the Malayo-Polynesian language family.[7][8] As of 2022, Guam's population was 168,801. Chamorros are the largest ethnic group, but a minority on the multi-ethnic island. The territory spans 210 square miles (540 km2; 130,000 acres) and has a population density of 775 per square mile (299/km2). The Chamorro people settled Guam and the Mariana islands approximately 3,500 years ago. Portuguese explorer Ferdinand Magellan, while in the service of Spain, was the first European to visit and claim the island on March 6, 1521. Guam was fully colonized by Spain in 1668. Between the 16th and 18th centuries, Guam was an important stopover for Spanish Manila galleons. During the Spanish–American War, the United States captured Guam on June 21, 1898. Under the 1898 Treaty of Paris, Spain ceded Guam to the U.S. effective April 11, 1899.
^Mack, Doug (2017). The Not-Quite States of America: Dispatches From the Territories and Other Far-Flung Outposts of the USA. W.W. Norton. p. 114. ISBN9780393247602.
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