In November 30, 2009, with 5,000 activists, Partido Lakas ng Masa was publicly launched during the commemoration of Bonifacio Day. Its tri-color flag, which was used by General Gregorio del Pilar during the revolution against Spain and against the entry of US colonialist forces, dotted the streets and the “Pagbabago! Sosyalismo!” slogan reverberated though out the marching route in Manila during that day.