Depends on your definition of trial. Non US citizens held in areas that are de facto controlled by the US have basic habeas rights: https://en.m.wikipedia.org

Depends on your definition of trial. Non US citizens held in areas that are de facto controlled by the US have basic habeas rights: https://en.m.wikipedia.org/wiki/Boumediene_v._Bush https://en.m.wikipedia.org/wiki/Boumediene_v._Bush That'd not hold for areas of active hostilities however. IANAL.