Daman and Diu is a union territory in northwestern India. With an area of 112 km2, it was the smallest administrative subdivision of India on the mainland. The territory comprised two districts, Daman and Diu island, geographically separated by the Gulf of Khambat. The state of Gujarat and the Arabian Sea bordered the territory. A Portuguese colony since the 1500s, the territories were taken by India with the Annexation of Goa in 1961.