My Father, My Son is a dual autobiography by father and son Elmo Russell Zumwalt Jr. and Elmo Russell Zumwalt III published by Macmillan Publishing Company in 1986, detailing their experiences during the Vietnam War and particularly with Agent Orange, an herbicide used for defoliation and crop destruction during the war. As a commander in the Navy, Zumwalt Jr. ordered the use of Agent Orange in South Vietnam, where Zumwalt III was stationed. In the 1980s, Zumwalt III was diagnosed with two cancers, non-Hodgkin's lymphoma and Hodgkin's disease, and his son, Elmo Russel Zumwalt IV, was diagnosed with a learning disability. Zumwalt III and his father co-wrote My Father, My Son to argue that Agent Orange caused their family's medical problems. contributing to a public discussion of what should be done for those exposed to Agent Orange.