On November 13, 2001, President Bush issued a Military Order (M.O.) authorizing trial by military commission of certain non-citizens suspected of participating in the war against terrorism. The Supreme Court struck down military commissions established pursuant to the M.O. as inconsistent with the Uniform Code of Military Justice (UCMJ). To permit military commissions to go forward, Congress approved the Military Commissions Act of 2006 (MCA), conferring authority to promulgate rules that depart from the strictures of the UCMJ and possibly U.S. international obligations.