Executive order and a 636-page annex issued on March 1 by Trump and the Department of Defense that prepares the way for Nuremberg-style tribunals.
https://www.whitehouse.gov/presidential-actions/2018-amendments-manual-courts-martial-united-states/
https://www.regulations.gov/document?D=DOD-2017-OS-0032-0003
https://www.whitehouse.gov/presidential-actions/2018-amendments-manual-courts-martial-united-states/
https://www.regulations.gov/document?D=DOD-2017-OS-0032-0003