The Road to Intervention (1988) uses rarely-seen British government papers to analyse the position of the Allied and Russian governments in the last year of the First World War, as the Russian revolution ended their participation in the war and the Western Allies feared a huge German offensive in France in consequence. The British government called for intervention in Russia; Trotsky played off the British against the Germans; the French and British were at loggerheads over the Czech Legion; and the Americans and Japanese argued over intervention in Siberia.