Before American entry into
World War II, Bunker participated in the 1939–1940 engineering review of a
barge canal project through Nicaragua by surveying the proposed route. It was made permanent on 10 March 1961. As Assistant Chief of Transportation for Army Aviation, Bunker helped arrange for the purchase of the
CV-2 Caribou. From 1956 to 1962, he served as commanding general of the
Army Transportation Materiel Command. His temporary promotion to
major general was approved on 24 February 1961. It was made permanent on 28 February 1963. He served as comptroller and director of programs for the Army Materiel Command from June 1962 to April 1964 and then became its deputy commanding general. From 1962 to 1968, he directed the expansion of the Army aircraft inventory from about 5,700 to over 11,000. Bunker was promoted to lieutenant general effective 9 May 1966 after having received
Senate confirmation. He died from a heart attack in his quarters at
Fort Myer,
Virginia two months before his scheduled retirement on 1 August 1969. ==Honors==