The SPLM as a rebel movement was formed on 16 May 1983, after the Sudan government's abandonment of the Addis Ababa agreement signed between the Gaafar Nimeiry government and the Anyanya leader Joseph Lagu, who had first introduced the Southern Sudanese to the effective political, economic, social, educational, and religious situations they would face after Sudan's independence. The movement published a manifesto setting out its positions and attracted a group of rebellious south Sudanese soldiers of the Sudanese Army based in Bor, Pochalla, and Ayod (first called the Bor Mutiny). These joined remnants of the Anyanya rebels of the First Sudanese Civil War based in Ethiopia. Founders of the SPLA (the military wing of the movement) included Captain Salva Kiir Mayardit, Samuel AbuJohn Khabas, Major William Nyuon Bany, Major Kerubino Kuanyin Bol and many other South Sudanese officers of the Sudan armed forces. Joseph Oduho was made chairman of the SPLM and Colonel John Garang, a Dinka army officer, was made commander of the SPLA. Later Oduho was deposed by Garang, who made himself overall leader of the combined movement (SPLA/M).