Until 1920, court-martial convictions were reviewed either by a commander in the field or by the President, depending on the severity of the sentence or the rank of the accused. The absence of formal review received critical attention during World War I, and the Army created an internal legal review process for a limited number of cases. Following the war, in the Act of June 4, 1920, Congress required the Army to establish Boards of Review, consisting of three lawyers, to consider cases involving death, dismissal of an officer, an unsuspended dishonorable discharge, or confinement in a penitentiary, with limited exceptions. The legislation further required legal review of other cases in the Office of the Judge Advocate General. Later under the UCMJ, the Boards were empowered to "weigh the evidence, judge the credibility of witnesses, and determine controverted questions of fact, recognizing that the trial court saw and heard the witnesses." It also charged each board with affirm[ing] only such findings of guilty and the sentence or such part or amount of the sentence, as it finds correct in law and fact and determines, on the basis of the entire record, should be approved." Finally, the UCMJ made the decisions of the Army Boards of Military Review binding on the Judge Advocate General and, by implication, binding on the Secretary of the Army and the President as well. The Military Justice Act of 1968 redesignated the Boards of Review as Courts of Military Review and provided each service court with a chief judge, appointed by the Judge Advocate General, and enabled the court to either sit
en banc or in panels, empowering the chief judge to designate the senior, or presiding, judge for each panel. The
All Writs Act empowers the court to issue extraordinary writs, such as
habeas corpus,
mandamus, and prohibition, in aid of its jurisdiction. The Military Justice Act of 1983 gave the court additional power to entertain interlocutory appeals by the Government from certain adverse trial rulings by the military judge. Congress also expanded the authority of the Judge Advocate General under UCMJ Article 69(a) to refer to the court records of trial other than those automatically reviewed by that Court under Article 66. In 1994, the U.S. Army Court of Military Review was renamed the U.S. Army Court of Criminal Appeals. This coincided with the renaming of the U.S. Court of Military Appeals to the U.S. Court of Appeals for the Armed Forces (CAAF). More recently, the Judge Advocate General, by regulation, granted tenure to the appellate judges serving on the Army court, as well as the trial judges. ==Operation==