Under the Commander in Chief Clause, the President is authorized to detain all enemy combatants and unlawful belligerents, including U.S. citizens. Such unlawful combatants and belligerents are subject to trial and punishment by our military tribunals. The use of martial law and the suspension of courts is not required. [Q 520, 613, 7 40, 2292, 2295, 2300. 2523, 2583, 2623]