Philippine Declaration of Independence
Following the end of World War II, the United States granted independence to the Philippines on 4 July 1946 via the Treaty of Manila. July 4 was observed in the Philippines as "Independence Day" until August 4, 1964 when, upon the advice of historians and the urging of nationalists, President Diosdado Macapagal signed into law Republic Act No. 4166 designating June 12 as the country's "Independence Day". June 12 had previously been observed as "Flag Day" and many government buildings are urged to display the Philippine Flag in their offices.
Spanish–American War
Commodore Dewey transported Emilio Aguinaldo, a Filipino leader who had led rebellion against Spanish rule in the Philippines in 1896, from exile in Hong Kong to the Philippines to rally more Filipinos against the Spanish colonial government. By June 9, Aguinaldo's forces controlled the provinces of Bulacan, Cavite, Laguna, Batangas, Bataan, Zambales, Pampanga, Pangasinan, and Mindoro, and had laid siege to Manila. On June 12, Aguinaldo proclaimed the independence of the Philippines.