A Regiment in Action - Paperback

History of the 21st regiment Ohio volunteer infantry, in the war of the rebellion - Paperback

History Of The 21st Regiment: Ohio Volunteer Infantry In The War Of The Rebellion (1892) - Paperback

The 21st Missouri Regiment Infantry Veteran Volunteers - Paperback

41 DIVISION 124 Infantry Brigade King's Royal Rifle Corps 21st Battalion: 5 May 1916 - 31 October 1917 (First World War, War Diary, WO95/2643/4) - Paperback

As Near Hell as I Ever Expect to Be.: The Civil War Letters of Lieutenant John V. Patterson of the 21st Regiment, Ohio Volunteer Infantry - Hardcover

25 DIVISION 7 Infantry Brigade Manchester Regiment 21st Battalion: 1 September 1918 - 5 July 1919 (First World War, War Diary, WO95/2244/5) - Paperback

40 DIVISION 119 Infantry Brigade Duke of Cambridge's Own (Middlesex Regiment) 21st Battalion: 1 February 1918 - 30 June 1918 (First World War, War Dia - Paperback

33 DIVISION 98 Infantry Brigade Royal Fusiliers (City of London Regiment) 21st Battalion: 26 April 1916 - 31 January 1917 (First World War, War Diary, - Paperback

21 DIVISION 110 Infantry Brigade Leicestershire Regiment 8th Battalion: 1 July 1916 - 31 May 1918 (First World War, War Diary, WO95/2165/1) - Paperback

21 DIVISION 62 Infantry Brigade Northumberland Fusiliers 12th Battalion: 1 January 1915 - 31 July 1917 (First World War, War Diary, WO95/2155/1) - Paperback

21 DIVISION 62 Infantry Brigade, Brigade Machine Gun Company: 23 February 1916 - 28 February 1918 (First World War, War Diary, WO95/2156/3) - Paperback

47 DIVISION 142 Infantry Brigade London Regiment 21st (County of London) Battalion (1st Surrey Rifles): 15 March 1915 - 31 January 1918 (First World W - Paperback

21 DIVISION 110 Infantry Brigade Leicestershire Regiment 7th Battalion: 29 June 1916 - 29 March 1919 (First World War, War Diary, WO95/2164/2) - Paperback

21 DIVISION 110 Infantry Brigade Leicestershire Regiment 6th Battalion: 1 July 1916 - 31 March 1919 (First World War, War Diary, WO95/2164/1) - Paperback

21 DIVISION 62 Infantry Brigade Lincolnshire Regiment 2nd Battalion: 1 February 1918 - 31 March 1919 (First World War, War Diary, WO95/2154/2) - Paperback

21 DIVISION 62 Infantry Brigade Northumberland Fusiliers 12/13th Battalion: 1 August 1917 - 24 April 1919 (First World War, War Diary, WO95/2155/3) - Paperback

21st Pennsylvania Cavalry: From Gettysburg to Appomattox - Hardcover

The Story Of The Twenty-first Regiment, Connecticut Volunteer Infantry, During The Civil War. 1861-1865 - Paperback

21 DIVISION Divisional Troops Senior Supply Officer: 15 September 1915 - 28 February 1919 (First World War, War Diary, WO95/2149/1) - Paperback

The Big Red One: America's Legendary 1st Infantry Division, Centennial Edition, 1917-2017 - Hardcover

U.S Army Infantry Battalion Field Manual FM 3-21.20 - Paperback

The History of the 321st Infantry With a Brief Historical Sketch of the 81st Division - Paperback