The legal fallout from Islamic State’s short but bloody existence is both complex and enduring. For those Westerners who travelled to Syria and Iraq to join the jihadist project, which ended with the fall of Baghouz in southeastern Syria in March 2019, justice has taken different forms. Many were killed by Syrian or Iraqi government forces, in air strikes carried out by their own country or that of an ally, or by armed groups supported by the West. Those men and women that survived the five years of conflict have been variously detained, tried in foreign jurisdictions, had their citizenship stripped and been left to languish in identity limbo, or been deported and tried at home.
Foreign fighters: The question of justice | The Interpreter (lowyinstitute.org)