The pressure for political transitions brought about by the Arab Spring in 2011 caused the descent of several countries in the region into civil war. Yemen is a prominent example, where internal turmoil turned into hostilities in 2014 and led to the military conquest by a non-state actor of the capital Sana’a. The Yemeni government relocated to the southern city of Aden, and in 2015 a Saudi-led foreign coalition intervened with military means in its support, a military campaign that is still ongoing four years later. In the years since 2015, the Saudi-led coalition has faced multiple allegations of serious violations of international humanitarian law. The subject of this thesis is the international law applicable to these atrocities, and legal and extra-legal impediments that exist for holding individuals in the Saudi-led coalition to account for international crimes.