S-3 Maj Lawrence W. Smith, Jr. (to 8 Mar 1951) Maj Robert E. Baldwin (from 9 Mar) LtCol Glen E. Martin (from 24 Jun) Maj Merwin H. Silverthorn, Jr. (from 11 Jul) Maj Gerald P. Averill (from 10 Oct) Maj David A. Brewster, Sr. (from 15 Dec) S-4 Maj Harold Wallace (to 9 Mar 1951) Maj William E. Baugh (from 10 Mar) Maj Robert S. Hudson (from 11 Aug) Maj Warren F. Lloyd (from 22 Dec) Commanding Officer, Headquarters and Service Company Capt Jack E. Hanthorn (to 1 Mar 1951) 1stLt Richard M. Woodard (from 2 Mar) 1stLt Lee J. Cary (from 22 Jun) Capt Howard H. Dismeier (from 12 Sep) 1stLt George “T” Capatanos (from 1 Dec) Commanding Officer, Antitank Company 1stLt Almarion S. Bailey (to 8 Apr 1951) 1stLt Jo M. Van Meter (from 9 Apr) 1stLt William E. Kerrigan (from 23 Jul) Capt Edgar F. Moore, Jr. (from 15 Aug) Commanding Officer, 4.2 Inch Mortar Company 1stLt Robert M. Lucy (to 25 Feb 1951) 1stLt Robert H. Uskurait (from 26 Feb) 1stLt John A. Buchanan (from 11 Sep) Capt Yale B. Davis (from 29 Dec) _1st Battalion, 5th Marines_