Daman and Diu were under Portuguese administration from the 1500s until they were annexed by India on 19 December 1961. Dadra and Nagar Haveli were under Portuguese administration from 1818 until they were captured by pro-India forces in 1954 and were formally annexed to India on 11 August 1961. Portugal officially recognised Indian sovereignty over the areas in 1974 following the Carnation Revolution.