On 19 October 1817, he reformed the Goodwood Troop of Yeomanry Artillery, originally raised by the 3rd Duke in 1797. The unit supported the cavalry of the Sussex Yeomanry but was disbanded in December 1827.L. Barlow & R.J. Smith, The Uniforms of the British Yeomanry Force 1794–1914, 1: The Sussex Yeomanry Cavalry, London: Robert Ogilby Trust/Tunbridge Wells: Midas Books, ca 1979, , p. 7. Richmond was appointed Colonel of the Royal Sussex Light Infantry Militia on 4 December 1819, and Colonel-in-Chief of its offshoot the Royal Sussex Militia Artillery, on its formation in April 1853.Hart's Army List, 1855.
