[4][5] Embittered by Jose Rizal's unjust arrest, he joined the Katipunan in May 1896 and formed a chapter called Matagumpay, taking the symbolic name Pang-una.

[5][6] As secretary of Magtagumpay, the Makati chapter Pio led about a thousand men in the latter stage of the Battle of San Juan del Monte in August 1896.

They took part in the barely remembered battles fought under Andres Bonifacio around what is now Metro Manila, and the subsequent move to Cavite under Emilio Aguinaldo.

[7] He was appointed the army corps commander by Andres Bonifacio and when the Supremo died, he joined Gen. Emilio Aguinaldo's forces and became one of his trusted generals.

[10] The annexation of MHS - PDP became the transition period towards its eventual independence thus becoming the now-known General Pio del Pilar National High School on June 28, 2002 via the City ordinance no.99-078 providing quality education for its constituents.

The program aims to provide a sufficient time for mastery of concepts and skills, develop lifelong learners, and prepare graduates for tertiary education, employment and entrepreneurship.