The Second Battle of Bud Dajo was a counter insurgency action fought by American soldiers against native Moros in December 1911, during the Moro Rebellion phase of the Philippine-American War.
On November 11, 1909, Major General John J. Pershing assumed his duties as governor of the Moro province. On September 8, 1911, he issued Executive Order No. 24, which ordered the complete disarmament of all Moros; American forces had been plagued with juramentado and amok attacks and Pershing saw total disarmament as the solution. The deadline for disarmament was December 1, 1911.
The attempted enforcement of this order brought about the Second Battle of Bud Dajo. In December 1911, an estimated 800 Moros fortified the top of the dormant volcano. Pershing, realizing the Moros had not time to provision their fortress, used two infantry battalions, a machine gun platoon, six troops of the 2nd Cavalry, a field artillery battery, five companies of the Philippine Scouts, and a company of Moro Constabulary. Pershing, through negotiations, succeeded in persuading the majority of the assembled Moros to return home.