On 1 January 1960, French Cameroun gained independence from France under President Ahmadou Ahidjo. On 1 October 1961, the formerly British Southern Cameroons gained independence by vote of the UN General Assembly and joined with French Cameroun to form the Federal Republic of Cameroon, a date which is now observed as Unification Day, a public holiday. Ahidjo used the ongoing war with the UPC to concentrate power in the presidency, continuing with this even after the suppression of the UPC in 1971.