The Guantanamo military commissions are military tribunals authorized by presidential order, then by the Military Commissions Act of 2006, and currently by the Military Commissions Act of 2009 for prosecuting detainees held in the United States Guantanamo Bay detainment camps.
The American Bar Association reported in January 2002:
"In response to the unprecedented attacks of September 11, on November 13, 2001, the President announced that certain non-citizens [of the USA] would be subject to detention and trial by military authorities. The [executive] order provides that non-citizens whom the President deems to be, or to have been, members of the al Qaeda organization or to have engaged in, aided or abetted, or conspired to commit acts of international terrorism that have caused, threaten to cause, or have as their aim to cause, injury to or adverse effects on the United States or its citizens, or to have knowingly harbored such individuals, are subject to detention by military authorities and trial before a military commission."
The United States Department of Defense (DOD) organized military tribunals to judge charges against enemy combatant detainees being held at Guantanamo Bay detention camp. In the early years, the camp authorities did not allow foreign detainees access to attorneys, or materials supporting their charges, and the executive branch declared them outside the reach of due process under habeas corpus. In Rasul v. Bush (2004), the US Supreme Court ruled that they did have rights to habeas corpus and had to be provided access to legal counsel and an opportunity to challenge their detention before an impartial tribunal.