GABRIELLE TÉTRAULT-FARBER, EMMA FARGE and KHALID ABDELAZIZ INTERNATIONAL donors made pledges of close to $1.5 billion in aid for Sudan and the surrounding region, about half of the estimated needs for a deepening humanitarian crisis that has driven some 2.2 million people from their homes. The conflict between Sudan's army and paramilitary Rapid Support Forces (RSF) has turned the capital Khartoum into a war zone and triggered lethal, repeated attacks and mass displacement in the western region of Darfur as well as other parts of the country. Though a 72-hour ceasefire has brought a lull in fighting in Khartoum since…