- The Katipunan was founded in 1892 by Andres Bonifacio and others as a secret organization aimed at gaining independence from Spain through revolution.
- It had three membership classes (Katipon, Kawal, Bayani) and used codes and countersigns to maintain secrecy. The organization published a newspaper to help recruitment.
- When the Philippine Revolution began in 1896, the Katipunan split into the Magdalo and Magdiwang factions which used different flags and had disagreements over leadership.