March 18, 1968: the Jabidah commando was massacred in corregidor
(Senator Benigno Aqjuino Jr. at the Senate floor. "No massacre")
On the evening of March 18, 1968, the Jabidah commando was said to be massacred in Corregidor. The alleged massacre resulted from the failed "Operation Merdeka", a plan to destabilize Sabah (North Borneo).
Planners within the Philippine military associated with President Ferdinand Marcos conceived a plot sometime in 1967 of establishing a force of commandos to destabilize Sabah, and then ultimately to take advantage of the instability by either intervening in the island on the pretext of protecting Filipinos living there, or by "the residents themselves deciding to secede from Malaysia". This became the "Operation Merdeka".