Japan's power in Asia grew following the collapse of the Imperial Russian government in 1917 after the Bolshevik Revolution. Wanting to seize the opportunity, the Japanese army planned to occupy Siberia as far west as Lake Baikal. To do so, Japan had to negotiate an agreement with China allowing the transit of Japanese troops through Chinese territory. Although the force was scaled back to avoid antagonizing the United States, more than 70,000 Japanese troops joined the much smaller units of the Allied expeditionary force sent to Siberia in July 1918 as part of the Allied intervention in the Russian Civil War.