percent of most Army units were staffed by soldiers and NCOs from the South. Most had little commitment or dedication to the government - they joined for the sugar and other rations given to soldiers, as well as the salary. Although they often acquitted themselves well in battle, generally surrendering only when their food and ammunition were depleted, they had little stomach for offensive operations. Under President Omar al-Bashir who seized power in the 1989 coup, armed forces under the government of Sudan included the Land Forces, the Sudanese Navy, the Sudanese Air Force, and the Popular Defence Forces, which were formed in 1989. The Land Forces were "basically a light infantry force in 1991, supported by specialized elements. ...[C]ontrol extended from the headquarters of the general staff in Khartoum to the six regional commands (central, eastern, western, northern, southern, and Khartoum). Each regional command was organized along divisional lines. Thus, the Fifth Division was at Al-Ubayyid in Kurdufan (Central Command), the Second Division was at Khashm El Girba (Eastern Command), the Sixth Division was assigned to Al-Fashir in Darfur (Western Command), the First Division was at Juba (Southern Command), and the Seventh Armoured Division was at As Shajarah just south of Khartoum (Khartoum Command). The Airborne Division was based at Khartoum International Airport. The Third Division was located in the north, although no major troop units were assigned to it. Each division had a liaison officer attached to general headquarters in Khartoum to facilitate the division's communication with various command elements. This organisational structure did not provide an accurate picture of actual troop deployments. All of the divisions were understrength. The Sixth Division in Darfur was a reorganised brigade with only 2,500 personnel. Unit strengths varied widely. Most brigades were composed of 1,000 to 1,500 troops." Keegan, writing in 1983, indicated that the northern command was located at Shendi. To reduce the pressure on the regular armed forces, the Sudanese government made extensive use of militias, such as the South Sudan Defence Forces. This largely symbolic coalition of seven groups was formed with the signing of the Khartoum Peace Agreement with the NIF in 1997. The SSDF was led by former Garang lieutenant Riek Machar. In 2004, the Federal Research Division of the Library of Congress estimated that the Popular Defence Forces, the military wing of the National Islamic Front, consisted of 10,000 active members, with 85,000 reserves. The