Field Marshal William Edmund Ironside, 1st Baron Ironside, GCB, CMG, DSO (1880-1959) was one of the most influential figures in the British army during the Interwar period, holding important positions in Russia, Persia, India and Gibraltar, and the Staff College at Camberley. His diaries, which run from 1918 to 1959 in 73 volumes, record many of the key events, debates and personalities during a significant period of British military history. The archive includes these diaries as well as photographic and printed papers collected on his travels. Military objects including: Field Marshal’s Baton, made by Garrard & Co, presented by King George VI; medals; his awards; insignia; and decorations presented to him between 1901 and 1939. The archive and militaria were each considered pre-eminent under the first and third criteria and have been permanently transferred to the following institutions as an Acceptance in Lieu of Inheritance Tax. The archive has been allocated to King’s College London for the Liddell Hart Centre for Military Archives and the militaria has been permanently transferred to the Royal Artillery Museum, Larkhill.