John Butler Walden (12 December 1939 – 7 July 2002) was a Tanzanian military officer. Born in British Tanganyika to a white father and black mother, he enlisted in the King's African Rifles in 1957 after finishing school. He eventually achieved the rank of sergeant and, following Tanganyika's independence, was transferred to the Tanganyika Rifles. In April 1963 he became a lieutenant. He was later promoted to major and held command of a camp in Mafinga. During the Uganda–Tanzania War of 1978 and 1979 Walden served as commander of the 207th Brigade in the Tanzania People's Defence Force with the rank of brigadier. In 1981 he organised the withdrawal of the Tanzanian troops in Uganda. By 1987 he had been promoted to major general and two years later he oversaw an anti-poaching operation. He