United States war crimes are violations of the laws and customs of war committed by the United States Armed Forces since the signing of the Hague Conventions of 1899 and 1907. These have included the summary execution of captured enemy combatants, the mistreatment of prisoners during interrogation, and the use of violence against civilian non-combatants.
War crimes can be prosecuted in the United States through the War Crimes Act of 1996. However, the United States Federal Government does not accept the jurisdiction of the International Criminal Court (ICC) over its nationals, as the United States directly opposes and is not a party to the Court.
Following the end of the Spanish–American War in 1898, Spain ceded the Philippines to the United States as part of the peace settlement. This triggered a more than a decade-long conflict between the United States Armed Forces and the First Philippine Republic under President Emilio Aguinaldo.
War crimes committed by the United States Army include the March across Samar, which led to the court martial and forcible retirement of Brigadier General Jacob H. Smith.