William Deng Nhial (1929 – 5 May 1968)[1] was the political leader of the Sudan African National Union (SANU), from 1962 to 1968. He was elected unopposed. He was one of founders of the military wing of the Anyanya fighting for the independence of southern Sudan. He was ambushed and killed by Sudanese Armed Forces (SAF) on 9 May 1968 at Cueibet, on his way from Rumbek to Tonj. The Sudanese government denied having authorised his assassination. Although no investigation was conducted, eyewitnesses at Cueibet village and an SANU investigation committee confirmed the SAF's part in his death.