The Oxford Institute for Ethics, Law and Armed Conflict and the Oxford Martin Programme on Human Rights for Future Generations, in cooperation with the International Committee of the Red Cross, convened the Transatlantic Workshop on International Law and Armed Conflict in July 2014. Now in its second year, the Transatlantic Workshop brought together leading academics, government officials and senior military lawyers from the UK, US, Canada, continental Europe and Israel for a roundtable dialogue on challenges in the application of international humanitarian law. Issues addressed during the two day workshop included: the relationship between human rights law and international humanitarian law; compliance with, and accountability for, violations of the law of armed conflict, particularly in multinational operations; whether the law applicable in international armed conflicts should be extended to non-international armed conflicts, the law applicable to military operations beyond the traditional battlefield, and the law applicable at the end of armed conflicts.