This treatment was used against captured "juramentado" so that the superstitious Moro would believe they would be going to hell. Pershing added that "it was not pleasant [for the Army] to have to take such measures". Historians do not believe that Pershing was directly involved with such incidents, or that he personally gave such orders to his subordinates. Letters and memoirs from soldiers describing events similar to this do not have credible evidence of Pershing having been personally involved. Similarly, the claim made by Donald Trump during his presidential campaign in February 2016 that Pershing executed 49 "Muslim terrorists" with bullets dipped in pig's blood, then let the 50th go free to spread the word about the religious atrocity, which Trump alluded to again while serving as president in August 2017, has been repeatedly debunked by historians, who find no evidence that such an incident occurred. On June 30, 1901, Pershing was honorably discharged from the Volunteers and he reverted to the rank of captain in the Regular Army to which he had been promoted on February 2, 1901. He served with the 1st Cavalry Regiment in the Philippines. He later was assigned to the 15th Cavalry Regiment, serving as an intelligence officer and participating in actions against the Moros. He was cited for bravery at Lake Lanao. In June 1901, he served as Commander of Camp Vicars in Lanao, Philippines, after the previous camp commander had been promoted to brigadier general. In June 1903, Pershing was ordered to return to the United States. President Theodore Roosevelt, taken by Pershing's ability, petitioned the Army General Staff to promote Pershing to colonel. At the time, Army officer promotions were based primarily on seniority rather than merit, and although there was widespread acknowledgment that Pershing should serve as a colonel, the Army General Staff declined to change their seniority-based promotion tradition just to accommodate Pershing. They would not consider a promotion to lieutenant colonel or even major. This angered Roosevelt, but since the President could only name and promote army officers in the General ranks, his options for recognizing Pershing through promotion were limited. In 1904, Pershing was assigned as the Assistant Chief of Staff of the Southwest Army Division stationed at Oklahoma City, Oklahoma. In October 1904, he attended the Army War College, and then was ordered to Washington, D.C. for "general duties unassigned." Since Roosevelt could not yet promote Pershing, he petitioned the United States Congress to authorize a diplomatic posting, and Pershing was stationed as military attaché in Tokyo in 1905.