Just over one hundred years ago, in 1902, Americans participated in a brief, intense and mostly forgotten debate on the practice of torture in a context of imperial warfare and counter-insurgency. The setting was the U. S. invasion of the Philippines, a war of conquest waged against the forces of the Philippine Republic begun in 1899. Within a year, it had developed into a guerrilla conflict, one that aroused considerable anti-war opposition in the United States.