After meetings in Berlin with Hitler and others, Foreign Minister Matsuoka went on to Moscow to finalize a neutrality treaty. At the tine, Stalin was still hoping to join the Axis and the Japanese were supporting him on this. They wanted the Soviet Union in the Axis as it would strengthen their pososition vis-à-vis the Americans. The Soviets wanted no distraction in the Far East as they expanded their territory in Europe. The Japanese wanted a quiet morthern frontier as they planned war with America and Britain. There he negotiated the Soviet–Japanese Neutrality Pact, only 2 years after the border conflict between the Soviets and Japan along the poorly defined on the Manchurian-Mongolian frontirt. border. It was signed April 13, 1941. The treaty required both narions to remain neutral if one of the two signing nations was invaded by a third nation. Both countries pledged to respect the sovereignty of Manchukuo (Japanese occupied Chinese Manchuria) and the Soviet controlled Mongolian People's Republic. The Japanese-Soviet treaty had very real significance in a world of armed camps. It meant that Japan and the Soviet Union could avoid fighting on multiple fronts. Stalin did not expect a German invasion as long as Britain and Germany were at war, but he did expect aan eventual showdown with Hitler. The Japanese were actively preparing for war with America. After the signing cermonies, Stalin, in an 'unprecedented' gesture, saw Foreign Minister Yosuke Matsuoka off at the Moscow train station. This was a sign of how important Stalin saw the Treaty. And as Barbarosa unfolded, he would be proven correct. This public display observed by the Moscow diplomatic corps sent a signal to Hitler. Stalin mean it to mstrengthen his effort to join the Axis, seeing it as strengthening his bargaining power. [Kissenger, pp. 365-66.] When the Germans launched Barbarossa only 2 months later, Stalin was convinced the Japanese were in on the deception. Japanese neutrality, however, allowed the Soviets to move Far Eastern forces west to resist the Germans. These Siberian troops, played an important role in the Soviet Winter offensive that saved Moscow (December 1941). It was also impotant to ensure pasage of Lend Lease material over the all important Pacific route. Japan's failure to stop these shipments would outrage Hitler. Slavinsky draws on recently opened Russian archival material to demonstrate that the Soviet Union was passing information about the Allies to Japan during the Second World War. One historian reports that recently opened Russian archives describes the Soviets passing information about the Allies to Japan. [Slavinsky] As the Pacific War went against Japan, the Japanese became desperate to renew the Treaty. And believed that the Soviets could help them negotiate a peace with the Americans.Stalin had no such interest. He saw major territorial gains to be made in the Far East and commited to entering the War with Japan 3 moths after the NAZIs surrendered. The Soviets after V-E Day (May 8,1945). The Soviets began a major movement of men and material east. The Japanese pressed for renewal of the Non-Aggression Treaty and ignored reports from their Mocow Ambassador that the Soviets had no interest. The Sviets informed the Japanese that thry were going to allow the Treaty to lapse 9 months before its expiration date -- April 1946. The Sovies struck in a massive offensive (August 9, 1945), the same day the second American atom bomb was dropped on Nagasaki.
Kissinger, Henry. Diplomacy.
Slavinsky, Boris. The Japanese-Soviet Neutrality Pact: A Diplomatic History 1941-1945 (New York: Routledge Curzon, 2004.), 227p.
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