The first Europeans to arrive in the region were the Portuguese in 1515. Dominican friars established a presence on the island in 1556, and the territory was declared a Portuguese colony in 1702. Following the beginning of the Carnation Revolution (a Lisbon-instigated decolonisation process) in 1975, East Timor was invaded by Indonesia. However, the invasion was not recognized as legal by the United Nations (UN), which continued to regard Portugal as the legal Administering Power of East Timor. The independence of East Timor was finally achieved in 2002 following a UN-administered transition period.