The war in Yemen has entered its fifth year, and the situation is more complex than ever. Tribal clashes and struggles between regional powers are intricately intertwined. The country is deeply fractured and the humanitarian crisis grows worse with each passing day. The agreement signed in Stockholm in December 2018 between Abd Rabbo Mansour Hadi’s government and Houthi rebels has barely made an impact on the ground. With the two sides locked in a stalemate, the limits of the UN’s capacity to intervene are plain to see.