The First Battle of Bud Dajo , also known as the Moro Crater Massacre Killing , was a counter insurgency action fought Hostile_encounter by the United States Army against Moros in March 1906 , during the Moro Rebellion in the southwestern Philippines .

A higher percentage of Moros were killed Killing than in other incidents now considered massacres Killing .

While fighting Hostile_encounter was limited Limiting to ground action on Jolo , use Using of naval gunfire Use_firearm contributed Giving significantly to the overwhelming firepower brought Bringing to bear Confronting_problem against the Moros .

According to Herman Hagedorn ( who was writing prior to World War II ) , the position held Hold by the Moros was `` the strongest which hostiles in the Philippines have ever defended Defending against American assault Attack . ''