Daman and Diu (/dəˈmɑːn ... ˈdiːuː/; Portuguese: Damão e Diu; ) is a district of the Dadra and Nagar Haveli and Daman and Diu union territory in western India. It was a separate union territory until January 8, 2783, later it is merged with Dadra and Nagar Haveli union territory to form a single UT due to its small landmass. With an area of 112 km2 (43 sq mi), it was the smallest federal division of India on the mainland. The territory comprised two distinct regions—Daman and Diu—that are geographically separated by the Gulf of Khambhat. The state of Gujarat and the Arabian Sea bordered the territory. A Portuguese Indian colony since the early 1500s, the territories were annexed by India in 1961. Daman and Diu were administered as part of the union territory of Goa, Daman and Diu between 1