It was in the period of 1972 to 1977 that the revolutionary forces struck deep roots among the people, especially among the toiling masses, on a national scale.
Panahon ito ng 1972 hanggang 1977 nang malalim na nakaugat ang rebolusyonaryong pwersa sa masa, laluna sa hanay ng masang anakpawis, sa pambansang saklaw.