In a raid coordinated between all the parties of the SRF that included the use of 20 vehicles, the opposition forces briefly held the strategic city of Um Rawaba in North Kordofan, located 300 miles (480 km) south of Khartoum.[17] As part of the offensive, JEM and the SRF also gained control of Abu Korshola, a strategic town of 40,000 in South Kordofan.[18] In its bid to retake control, the Sudanese Armed Forces engaged in indiscriminate air raid campaigns.[19] On May 27, the opposition forces withdrew in order to allow humanitarian aid to be delivered to the area's residents.[20] During 2013, opposition forces continued to engage in offensive operations, leading to dozens of casualties for Sudanese forces around Abu Korshola.[21][22]