The photograph shows the allied commanders Lord Raglan (1788–1855), Omar Pascha (1806–1871) and Aimable Pélissier (1794–1864) at a morning conference.
Roger Fenton (1819–1869), The Council of War on the Morning of the Taking of the Mamelon Redoubt, collodion photograph, 1855; image source: Imperial War Museum, https://www.iwm.org.uk/collections/item/object/205022053, © IWM Q 71089.