Located on Tutuila, the largest of the Samoan islands in the South Pacific Ocean, Pago Pago is the capital of American Samoa. First settled by the Polynesians around 600 BC, the islands became a territory of the US in 1900. An important coaling station and naval base, the Pago Pago harbor proved to be of strategic importance during World War II. Today its beauty and ecological diversity make it a popular tourist destination.