Sudan’s civil war, already the world’s worst humanitarian disaster, is entering a more dangerous phase as the UAE and RSF threatens to open a new front through Ethiopia. Writing in Foreign Policy, Cameron Hudson and Liam Karr argue that the UAE, the main backer of the RSF, may be using Ethiopia to expand supply lines and operations, particularly near the GERD region on Sudan’s eastern border. They warn that this could further regionalize the war, draw in Ethiopia, Eritrea, and Egypt, and worsen Sudan’s humanitarian situation in a widening proxy battlefield for Gulf and regional powers. The authors say Washington understands that such an escalation would undermine U.S. Red Sea, counterterrorism, and maritime interests, but has yet to draw firm red lines. They argue the international community, led by Washington, should do all it can to prevent the emergence of a new Ethiopia-UAE axis in Sudan’s war.