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After his Vietnam War tour, Gray served as Commanding Officer of the 1st Battalion, 2nd Marines, Battalion Landing Team 1/2; the 2nd Marine Regiment; the 4th Marine Regiment; and Camp Commander of Camp Hansen, Okinawa, Japan.
The term China Marines originally referred to those United States Marines from the 4th Marine Regiment who were stationed in Shanghai, China during 1927 - 1941 to protect American citizens and their property in the Shanghai International Settlement during the Chinese Revolution and the Second Sino-Japanese War.
In the early stages of World War II, General Howard commanded the 4th Marine Regiment on Bataan and Corregidor from December 7, 1941 to May 6, 1942.