N'afọ 1918, Japan gara n'ihu ịgbasa mmetụta ya na ihe ùgwù ya na China site na Nishihara Loans. Mgbe mgbanwe Bolshevik na Russia gasịrị, Japan na United States zigara ndị agha na Siberia na 1918 iji kwado ndị agha nke onye ndu White Movement Admiral Alexander Kolchak megide ndị Bolshevik Red Army. Na ntinye aka nke Siberia a, ndị agha Imperial Japanese zubere iziga ihe karịrị ndị agha 70,000 iji weghara Siberia dị ka ọdịda anyanwụ dị ka ọdọ mmiri Baikal. Atụmatụ ahụ gbadara azụ nke ukwuu n'ihi mmegide sitere na United States.
United States