from the White Army authorities. Despite this, he developed a rapport with his men and an admiration for the Russian soldier. Although British forces were ordered home shortly afterwards, Horrocks and another officer, George Hayes, remained to advise the First Siberian Army. The White Army was in retreat, and Horrocks joined them as they fell back to Vladivostok, away. He was captured by the Red Army on 7 January 1920, in the town of Krasnoyarsk, and spent 10 months as a prisoner, narrowly surviving severe typhus. The British government negotiated a prisoner release, and Horrocks left Russia on 29 October, returning home on the Royal Navy cruiser HMS Delhi. Back home Horrocks rejoined his regiment, based in Germany with the British Army of the Rhine, and followed it to Ireland, then embroiled in the Anglo-Irish War. His duties included searching for arms and dealing with ambushes and roadblocks, which he called "a most unpleasant form of warfare". This was followed by a short period in Silesia to deal with tensions between the Polish and German populations. On his return to Britain, Horrocks took up the modern pentathlon. He competed successfully in army tournaments, and was picked for the British Olympic team for the 1924 Paris Olympics, where he finished 19th out of 38. Horrocks spent the remainder of the inter-war years in postings that included adjutant for the 9th Battalion, Middlesex Regiment of the Territorial Army (1926–1930); student at the Staff College, Camberley (1931–32); Staff Captain at the War Office (1934–36); brigade major with the 5th Infantry Brigade (1936–38); and instructor at the Staff College. The Territorial Army posting, which Horrocks considered to be among his happiest periods, provided experience in dealing with citizen soldiers, which would prove highly valuable during the Second World War. He received a brevet majority in 1935, and was promoted to substantive major in 1936, and brevet lieutenant colonel in 1937. In 1928, Horrocks married Nancy Kitchin, daughter of an architect for the Local Government Board. They had one child, a daughter named Gillian, who drowned in 1979 while swimming in the River Thames. Second World War At the outbreak of the Second World War, Horrocks was working as an instructor at the Staff College, Camberley, where he had taught since 1938. After helping organise a new, shorter, officer-training course, in December 1939 he was promoted to substantive lieutenant colonel. The following May, he was