Bautista solicited funds to finance a campaign for reforms in the Philippines, later becoming a member of the
La Liga Filipina, Cuerpo de Compromisarios and La Propaganda. In 1896, the Spaniards arrested and imprisoned him at
Fort Santiago, as he was suspected of being involved in the
Philippine Revolution; Bautista elected to defend himself and was later released from prison. In 1898, Bautista became the first adviser to President
Emilio Aguinaldo and subsequently wrote the Declaration of Philippine Independence. Contrary to common belief, it was Bautista, and not
Aguinaldo, who waved the Philippine flag before the crowd on June 12, 1898, during the
Philippine Proclamation of Independence in
Cavite. ==Legacy and remembrance==