Declaring it necessary to bring to justice those responsible for the terrorist attacks on the United States of September 11, 2001, President Bush signed a Military Order (M.O.) authorizing the trial by military commission of certain non-citizens. The order directed the Secretary of Defense to establish the procedural rules for the operation of the military commissions convened pursuant to the M.O. The Department of Defense implemented regulations and convened commissions; however, one of the accused petitioned for habeas corpus in federal district court and the Supreme Court invalidated the regulations as inconsistent with the Uniform Code of Military Justice (UCMJ ) and the Geneva Conventions. This report provides a brief overview of procedural rules applicable in selected historical and contemporary tribunals for the trials of war crimes suspects. The chart that follows compares selected procedural safeguards employed in criminal trials in federal criminal court with parallel protective measures in military general courts-martial, international military tribunals used after World War II, including the International Military Tribunal (IMT or "Nuremberg Tribunal"), and the International Criminal Courts for the former Yugoslavia (ICTY) and Rwanda (ICTR). The chart identifies a selection of basic rights in rough order of the stage in the criminal justice process where they might become most important. The text of the chart indicates some of the procedural safeguards designed to protect these rights in different tribunals. Recognizing that fundamental fairness relies on the system of procedural safeguards as a whole rather than individual rules, the chart is intended only as an outline to compare some of the rules different courts and tribunals might use to safeguard certain rights. The Constitution imposes on the government a system of restraints to provide that no unfair law is enforced and that no law is enforced unfairly. What is fundamentally fair in a given situation depends in part on the objectives of a given system of law weighed alongside the possible infringement of individual liberties that system might impose. In the criminal law system, some basic objectives are to discover the truth, punish the guilty proportionately with their crimes, acquit the innocent without unnecessary delay or expense, and prevent and deter further crime, thereby providing for the public order. Military justice shares these objectives in part, but also serves to enhance discipline throughout the armed forces, serving the overall objective of providing an effective national defense. The equation for international criminal law may also consider foreign policy elements as well as international law and treaty obligations. The Fifth Amendment to the Constitution provides that "no person shall be ... deprived of life, liberty, or property, without due process of law." Due process includes the opportunity to be heard whenever the government places any of these fundamental liberties at stake. The Constitution contains other explicit rights applicable to various stages of a criminal prosecution. Criminal proceedings provide both the opportunity to contest guilt and to challenge the government's conduct that may have violated the rights of the accused. The system of procedural rules used to conduct a criminal hearing, therefore, serves as a safeguard against violations of constitutional rights that take place outside the courtroom. The Bill of Rights applies to all citizens of the United States and all aliens within the United States. However, the methods of application of constitutional rights, in particular the remedies available to those whose rights might have been violated, may differ depending on the severity of the punitive measure the government seeks to take and the entity deciding the case. The jurisdiction of various entities to try a person accused of a crime could have a profound effect on the procedural rights of the accused. The type of judicial review available also varies and may be crucial to the outcome. International law also contains some basic guarantees of human rights, including rights of criminal defendants and prisoners. Treaties to which the United States is a party are expressly made a part of the law of the land by the Supremacy Clause of the Constitution, and may be codified through implementing legislation. International law is incorporated into U.S. law. The law of war, a subset of international law, applies to cases arising from armed conflicts (i.e., war crimes). It is unclear exactly how the law of war applies to the current hostilities involving non-state terrorists, and the nature of the rights due to accused terrorist/war criminals may depend in part on their status under the Geneva Conventions. The Supreme Court has ruled that Al Qaeda fighters are entitled at least to the baseline protections applicable under Common Article 3 of the Geneva Conventions, which includes protection from the "passing of sentences and the carrying out of executions without previous judgment pronounced by a regularly constituted court, affording all the judicial guarantees which are recognized as indispensable by civilized peoples." The federal judiciary is established by Article III of the Constitution and consists of the Supreme Court and "inferior tribunals" established by Congress. It is a separate and co-equal branch of the federal government, independent of the executive and legislative branches, designed to be insulated from the public passions. Its function is not to make law but to interpret law and decide disputes arising under it. Federal criminal law and procedures are enacted by Congress and housed primarily in title 18 of the U.S. Code. The Supreme Court promulgates procedural rules for criminal trials at the federal district courts, subject to Congress's approval. These rules, namely the Federal Rules of Criminal Procedure (Fed. R. Crim. P.) and the Federal Rules of Evidence (Fed. R. Evid. ), incorporate procedural rights that the Constitution and various statutes demand. The chart cites relevant rules or court decisions, but makes no effort to provide an exhaustive list of authorities. The Constitution, in order to provide for the common defense, gives Congress the power to raise, support, and regulate the armed forces, but makes the President Commander-in-Chief of the armed forces. Article III does not give the judiciary any explicit role in the military, and the Supreme Court has taken the view that Congress' power "[t]o Make Rules for the Government and Regulation of the land and naval Forces" is entirely separate from Article III. Therefore, courts-martial are not considered to be Article III courts and are not subject to all of the rules that apply in federal courts. Although military personnel are "persons" to whom the Bill of Rights applies, in the military context it might be said that discipline is as important as liberty as objectives of military justice. Also, the Constitution specifically exempts military members accused of a crime from the Fifth Amendment right to a grand jury indictment, from which the Supreme Court has inferred there is no right to a civil jury in courts-martial. However, in part because of the different standards provided in courts-martial, their jurisdiction is limited to those persons and offenses the military has a legitimate interest in regulating. Courts-martial jurisdiction extends mainly to service members on active duty, prisoners of war, and persons accompanying the armed forces in time of declared war, as well as certain violators of the law of war. Congress regulates the armed forces largely through title 10 of the U.S. Code, which contains as Chapter 47 the Uniform Code of Military Justice (UCMJ) regulating the system of military courts-martial. The Supreme Court has found the procedures Congress set through the UCMJ to provide adequate procedural safeguards to satisfy constitutional requirements and the interest in maintaining a strong national defense. Congress has delegated to the President the authority to make procedural rules for the military justice system. The President created the Rules for Courts-Martial (R.C.M.) and the Military Rules of Evidence (Mil. R. Evid.) pursuant to that delegation. The comparison chart will cite provisions of the UCMJ and the applicable rules, as well as military appellate court opinions as applicable. Defendants are not able to appeal their courts-martial directly to federal courts, but may seek relief in the form of a writ of habeas corpus, although review may be limited. However, Congress has provided for a separate system of reviewing convictions by court-martial, which includes a civilian appellate court. In cases in which the convening authority approves a sentence of death, or, unless the defendant waives review, approves a bad-conduct discharge, a dishonorable discharge, dismissal of an officer, or confinement for one year or more, the Court of Criminal Appeals for the appropriate service must review the case for legal error, factual sufficiency, and appropriateness of the sentence. The Court of Appeals for the Armed Forces (CAAF) exercises appellate jurisdiction over the services' Courts of Criminal Appeals, with respect to issues of law. The CAAF is an Article I court composed of five civilian judges appointed for 15-year terms by the President with the advice and consent of the Senate. Its jurisdiction is established in Article 67 of the UCMJ (10 U.S.C. § 867), and is discretionary except in death penalty cases. The Constitution empowers the Congress to declare war and "make rules concerning captures on land and water," to define and punish violations of the "Law of Nations," and to make regulations to govern the armed forces. The power of the President to convene military commissions flows from his authority as Commander in Chief of the Armed Forces and his responsibility to execute the laws of the nation. Under the Articles of War and subsequent statute, the President has at least implicit authority to convene military commissions to try offenses against the law of war. There is, therefore, somewhat of a distinction between the authority and objectives behind convening military courts-martial and commissions. Rather than serving the internally directed purpose of maintaining discipline and order of the troops, the military commission is externally directed at the enemy as a means of waging successful war by punishing and deterring offenses against the law of war. Jurisdiction of military commissions is limited to time of war and to trying offenses recognized under the law of war or as designated by statute. While case law suggests that military commissions could try U.S. citizens as enemy belligerents, the Military Order of November 13, 2001 limits their jurisdiction to non-citizens.