Walter Tull With Jean Warnock

Walter Tull in his officer's uniform with Jean Warnock, his brother Edward's Glaswegian adoptive mother, on holiday at Garelochhead in Scotland. Walter Tull is believed to be one of the first black infantry officers to lead British troops in the First World War, despite army regulations that prohibited a person of 'non-European descent' from undertaking officer training. (Photo by Walter Tull Archive/Finlayson Family Archive/Getty Images)