1856 F. Nightingale in C. Woodham-Smith (1950) xii. 275 G.H.Q. feeding their horses on the biscuits the men could not eat.
1915 A. C. Walsh 16 Jan. (1916) 52 We are billeted at Delelle, a small village about 10 miles due south of G.H.Q., at St. Omer.
2003 A. O. Mitha xiii. 160 I do not subscribe to the attitude that any decent soldier abhors working in GHQ.