"But this was abandoned when their forces took heavy casualties in Northern Luzon, in favor of dispersing their forces.Eventually the NPA's stockpile of weaponry allegedly soon grew to 60 guns, but all 60 of these guns were lost in an encounter the Armed Forces of the Philippines, and they were not able to regain firepower until the defection of Lt. Victor Corpus and the December 29, 1970 PMA Armory Raid.