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This is the panel on the use of defensive force against non-state actors. We thought we would use the campaign against the Islamic State in Iraq and Syria, ISIS, to take stock on where we are on the question of when, if ever, states may use defensive force against non-state actors in other states.

Just to set the scene a little bit, I am sure many of you know that ISIS is a transnational terrorist group that emerged in Syria in 2013, in the middle of the civil war there. By the summer of 2014, ISIS occupied quite a bit of territory in Syria and crossed into Iraq.Within months, dozens of states were participating in or supporting a U.S.-led campaign against ISIS. Almost all of these states appeared to support the operations that were being conducted both in Iraq, at the Iraqi government’s consent, and in Syria; of course, the campaign in both states was necessary to defeat ISIS.


International Law | Law


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