Political map of East Asia and the Western Pacific 13 February 1897 (Philippine Revolution): Over the 19th century, increasing access to the outside world had led to the growth of revolutionary movements in the Philippines, challenging Spain's 330-year rule over the islands (Captaincy General of the Philippines). On 24 August 1896, the nationalist Katipunan organization declared an independent Tagalog state, sparking the Philippine Revolution.