American Samoa, an unincorporated territory of the United States located in the South Pacific Ocean, is composed of five volcanic islands and two coral atolls, with Tutuila being the largest and most populous. The indigenous Samoan people have inhabited the islands for around 3,000 years, developing a rich Polynesian culture governed by traditional chiefs (matai) and strong communal values. European contact began in the 18th century, but American involvement intensified in the late 19th century when the United States, Germany, and the United Kingdom competed for influence in the Samoa archipelago. In 1899, under the Treaty of Berlin, the islands were formally divided, with the eastern islands becoming American Samoa and the western islands eventually becoming the independent nation of Samoa. In 1900, the chiefs of Tutuila ceded their island to the United States, followed by the Manuʻa islands in 1904. Since then, American Samoa has remained a strategically important U.S. territory, particularly during World War II. Today, it retains a unique blend of American governance and enduring Samoan cultural traditions, operating under its own constitution and locally elected government while its residents are considered U.S. nationals but not citizens.