military police, disciplinary force, composed of soldiers, that exercises police and related functions in armies. Generally, their principal duty is to maintain law and order, prevent and investigate crime within the army, and operate confinement facilities. They also engage in combat as infantry when required.

In the United States, military police constitute a separate branch of the army known as the Military Police Corps. Although it had a long, irregular history dating back to 1776, the corps as a unified, centrally directed organization developed only with the rapid expansion of the army during and after World War II. Its responsibilities extend wherever U.S. troops are stationed. The head of the corps, the provost marshal general, is the chief law-enforcement authority on the staff of the Department of the Army.

In the United Kingdom the military police are organized as a combat corps in the army and have been known since 1946 as the Corps of the Royal Military Police. At the head of the corps is the provost marshal, one of the most ancient appointments in the army. In addition to the usual functions performed by all military police, the corps’ duties include the preservation of discipline outside unit bases, road patrols and traffic control, and escorts and antivice duties. In war, in addition to controlling prisoners of war and stragglers, the corps manned information posts, cared for refugees, and prevented looting.

Most other countries of the world, except those of continental Europe, have formed their military police on the United States and British models.

This article was most recently revised and updated by Amy Tikkanen.
Plural:
Courts-martial, or Court-martials

court-martial, military court for hearing charges brought against members of the armed forces or others within its jurisdiction; also, the legal proceeding of such a military court. In ancient times, soldiers generally forfeited any rights that they might have had as civilians and were completely subject to the will of their military commanders. Such military law prevailed through medieval times in Europe until the 16th century, when the beginnings of a military judicial process arose, creating military councils charged with the duty of determining guilt and punishment.

The British Mutiny Act of 1689 provided for the disciplining of a standing army and initiated modern Anglo-American military law. Most modern countries have separate military codes of justice administered by military courts, usually subject to civilian appellate review. Germany is a notable exception, delegating the trial and punishment of military personnel to the civilian courts, except for the most petty of offenses.

Generally, courts-martial are convened as ad hoc courts to try one or more cases referred by the convening authorities. A general court-martial can be convened only by the commander of a major military installation, by a general or flag officer, or by some higher military authority. A special court-martial can be convened by a regiment-grade or brigade-grade officer. Whereas a general court-martial can try any offense and impose any penalty, the special court-martial is limited in its penalty to short-term confinement and dishonourable discharge. The convening officer chooses officers from his command to sit on the court, where they determine guilt or innocence and hand down sentences.

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military law: Court-martial