The island has a documented history of over 3,000 years, with evidence of prehistoric human settlement dating back 125,000 years.[16] Sri Lanka has been given various names throughout its long history, with Ceylon most notably being used prior to its independence. The earliest known Buddhist writings in the island, known collectively as the Pali Canon, date back to 29 BCE.[17][18] Sri Lanka, owing to its strategic geographical location, played a role as a major trading hub, and was well known to explorers across the world as early as the Anuradhapura period. The Portuguese Empire established a colony in the sixteenth century, during a period of political upheaval in the Kingdom of Kotte where it also faced attacks from neighboring kingdoms of Kandy and Sitawaka. Following the Sinhalese–Portuguese War, the Dutch colonial empire controlled the coastal areas. By the early 19th century, the British Empire established a colony on the island, which lasted until 1948. The early 20th century saw the rise of nationalist movements and increasing calls for independence. In 1948, Sri Lanka gained independence as the Dominion of Ceylon, eventually becoming a republic in 1972. Sri Lanka's recent history has been marred by a prolonged civil war between the Tamil separatist militant organisation of Liberation Tigers of Tamil Eelam and the Sri Lankan Armed Forces, which lasted from 1983 to 2009, and ended with the defeat of the separatists.[19]