The war in Sudan will likely trigger ethnic, territorial and resource disputes in South Sudan that could ignite long-standing tensions, disrupt oil exports and propel the country back into conflict. Despite several internationally brokered cease-fires in recent weeks, the conflict in Sudan between the Sudanese Armed Forces (SAF) and the paramilitary Rapid Support Forces (RSF) has spread from its epicenter in Khartoum to the country's peripheries. In the western region of Darfur, for example, clashes between the SAF, the RSF and various allied militias have pushed more than 155,000 people across the border into Chad. Fighting has also spread to the city of al-Dalanj in South Kordofan state, where clashes have reportedly forced 117,000 people to flee across the border to South Sudan. While the central battle for power between the SAF and the RSF continues to drive violence, fighting in some areas (like Darfur) is taking on an ethnic...