The United States was informally allied with Katipunan forces under Emilio Aguinaldo from the time of Aguinaldo's return to Manila on May 19, 1898 until those forces were absorbed into a government proclaimed by Aguinaldo on May 24, 1898, and continued to be informally allied with government forces until the end of the war. Guevara, Sulpico, ed. (2005), "Philippine Declaration of Independence", The laws of the first Philippine Republic (the laws of Malolos) 1898-1899., Ann Arbor, Michigan: University of Michigan Library (published 1972), retrieved 2008-03-26 . (English translation by Sulpicio Guevara) Guevara, Sulpico, ed. (2005), "Facsimile of the Proclamation of the Philippine Independence at Kawit, Cavite, June 12, 1898", The laws of the first Philippine Republic (the laws of Malolos) 1898-1899., Ann Arbor, Michigan: University of Michigan Library (published 1972), retrieved 2008-03-26 .