Benjamin Wittes, Robert Chesney and Larkin Reynolds describe in detail and analyze the U.S. courts’ work to date on habeas corpus cases concerning Guantánamo detainees. As the courts are now the main decision-makers in the effort to define the rules of military detention, the law established in these cases will in all likelihood govern not merely the Guantánamo detentions themselves, write the authors, but any other detentions around the world over which American courts might acquire habeas jurisdiction.