CEP Non-resident Fellow: "For more than three decades, Oman has served in the role of mediator for the resolution of disputes in Yemen. This began after north and south Yemen unified in the early 1990s, and then Yemen and Oman officially demarcated the contested border between the two countries. Today, however, there is good reason to question whether Oman is in fact a neutral arbiter and whether its current role in the Yemeni arena promotes regional stability."