I don't think Military is the only way. Military, marital law and suspension of habeas corpus is what got us in this mess in the first place.
Ex parte Quirin, 317 U.S. 1 (1942)
Supreme Court decision
The Supreme Court had issued its decision on July 31, 1942, but did not release a full opinion until October 29, 1942. In this decision, the Court held that
(1) That the charges preferred against petitioners on which they are being tried by military commission appointed by the order of the President of July 2, 1942, allege an offense or offenses which the President is authorized to order tried before a military commission.
https://en.wikipedia.org/wiki/Ex_parte_Quirin#Supreme_Court_decision