The Battle of San Juan del Monte, also referred to as Battle of Pinaglabanan, took place on August 30, 1896. It is considered as the first major battle of the Philippine Revolution, which sought Philippine independence from Spain. The first battle cry of the Katipunan coincided with the pealing of church bells at nine o'clock on the night of August 29, 1896.

The Katipunan, officially the Kataastaasan Kagalang-galang na Katipunan ng mga Anak ng Bayan and abbreviated as the KKK, was a revolutionary organization founded in 1892 by a group of Filipino nationalists Deodato Arellano, Andrés Bonifacio, Valentin Diaz, Ladislao Diwa, José Dizon, and Teodoro Plata. Its primary objective was achieving independence from the Spanish Empire through an armed revolution. It was formed as a secret society before its eventual discovery by Spanish authorities in August 1896. This discovery led to the start of the Philippine Revolution.