After three years of great loss and suffering on the Eastern Front, Imperial Russia was in crisis and on the verge of revolution. In November 1917, Lenin's Bolsheviks (later known as 'Soviets') seized power, signed a peace treaty with the Central Powers and brutally murdered Tsar Nicholas (British King George's first cousin) and his children so there could be no return to the old order. As Russia fractured into loyalist 'White' and revolutionary 'Red' factions, the British government became increasingly drawn into the escalating Russian Civil War after hundreds of thousands of German troops transferred from the Eastern Front to France were used in the 1918 'Spring Offensive' which threatened Paris. What began with the landing of a small number of Royal Marines at Murmansk in March 1918 to protect Allied-donated war stores quickly escalated with the British government actively pursuing an undeclared war against the Bolsheviks on a number of fronts in support of British trained and equipped 'White Russian' Allies. At the height of British military intervention in mid-1919, British troops were fighting the Soviets far into the Russian interior in the Baltic, North Russia, Siberia, Caspian and Crimea simultaneously. The full range of weapons in the British arsenal were deployed including the most modern aircraft, tanks and even poison gas. British forces were also drawn into peripheral conflicts against 'White' Finnish troops in North Russia and the German 'Iron Division' in the Baltic. It remains a little known fact that the last British troops killed by the German Army in the First World War were killed in the Baltic in late 1919, nor that the last Canadian and Australian soldiers to die in the First World War suffered their fate in North Russia in 1919 many months after the Armistice. Despite the award of five Victoria Crosses (including one posthumous) and the loss of hundreds of British and Commonwealth soldiers, sailors and airmen, most of whom remain buried in Russia, the campaign remains virtually unknown in Britain today. After withdrawal of all British forces in mid-1920, the British government attempted to cover up its military involvement in Russia by classifying all official documents. By the time files relating to the campaign were quietly released decades later there was little public interest. Few people in Britain today know that their nation ever fought a war against the Soviet Union. The culmination of more than 15 years of painstaking and exhaustive research with access to many previously classified official documents, unpublished diaries, manuscripts and personal accounts, author Damien Wright has written the first comprehensive campaign history of British and Commonwealth military intervention in the Russian Civil War 1918-20.