August 23 – Andres Bonifacio, along with his Katipuneros (Filipino revolutionaries), tear up their cedulas (personal identity documents) at the event known as the "Cry of Pugad Lawin".[1]
August 30 – Around 800 revolutionaries led by Bonifacio and Emilio Jacinto attack San Juan del Monte and achieve a brief victory until Spanish reinforcements arrive and disperse the rebels. Upon learning of the battle, Governor-GeneralRamón Blanco y Erenas places eight provinces under martial law. Sancho Valenzuela is the most notable of the revolutionaries who are imprisoned and later released.[3]