California National Guard
Returning to civilian life, he was a real estate officer in the trust department of the Pacific Southwest Trust and Savings Bank, of which his father, former Judge Hervey, was executive vice-president; a position he would one day hold with Security First National Bank of Los Angeles.
He entered the California National Guard in 1922 where his connection with the 160th Infantry, known as "Los Angeles' Own," began. He was appointed lieutenant colonel and advanced to the rank of Major General. During World War II he saw overseas duty, 1942-45, and was awarded the Purple Heart, Medal of Merit (State of California), Philippine Liberation Medal, Bronze Star (2 awards), and the Fouragerre of Crox de Guerre.
He was a member of Psi Upsilon, American Legion, and was a Mason (Scottish Rite). He was a member and served as Marshall of the Sons of the Revolution in the State of California by virtue of his great-great grandfather, William King, who served as a private in both the New Jersey Militia and Continental Line during the Revolution. His son, Harcourt Hervey, Jr., also a member of the Sons of the Revolution, was a Mortgage Loan Officer and Lieut. Colonel (Ret.).