 Subjected to intense diplomatic pressure by the United States and the United Kingdom, and facing increasing domestic opposition due to the economic and human cost, the administration of Prime Minister Kato Tomosaburo withdrew the Japanese forces in October 1922.Japan's motives in the Siberian intervention were complex and poorly articulated.Overtly, Japan (as with the United States and the other international coalition forces) was in Siberia to safeguard stockpiled military supplies and to "rescue" the Czechoslovak Legion.