If you really want to go deeper, look at how American Communists in Japan in the 1930s pushed and prodded Japanese policy towards invading Southeast Asia, instead of Siberia, for their resources. Siberia would've been a natural extension of their ground war in Manchuria, and would not have drawn the wrath of the US. Instead, many Communists in the State Department, and the Institute of Pacific Relations, wanted Japan to fight the US, instead of the Soviets.
If you really want to go deeper, look at how American Communists in Japan in the 1930s pushed and prodded Japanese policy towards invading Southeast Asia, instead of Siberia, for their resources. Siberia would've been a natural extension of their ground war in Manchuria, and would not have drawn the wrath of the US. Instead, many Communists in the State Department, and the Institute of Pacific Relations, wanted Japan to fight the US, instead of the Soviets.