The more I study WWII, the more I am shocked at Japan’s remarkable operational and tactical genius, and their likewise remarkable deficits in the strategic and geopolitical dimensions. Japan seemed to never follow the maxim, “One war at a time,” as stated by Lincoln to Seward, who considered expanding the Civil War to Britain and France.
Japan’s series of border wars with Russia between 1932-1939, reaching its climax in Khalkhin Gol in 1939, was reckless, especially given the fact that in May 9, 1939, just two days before the beginning of Japan’s invasion of Russia in May 11, 1939, Japan had won a victory in the Battle of Nanchang…but to continue this with an opening of a second front…? By September 16, 1939, the Battle of Khalkhin Gol had ended, with a total Japanese defeat. A hypothetical ensuing Sino-Soviet alliance would have been a complete military and geopolitical disaster, for Japan. Such an alliance was possible because on September 11, 1939, five days before the Soviet-Japanese battle ended, Germany invaded the western half of Poland, which led to a declaration of war on Germany by Britain and France. This meant that Germany would face a war on its western borders; the nonaggression pact with the USSR (22 August 1939) formalized the geopolitical reality that Germany wasn’t planning to fight a two front war. The fact that the Soviet Union now could concentrate its forces in the east was the major factor in Japan choosing to end the battle and cut its losses.
If the Soviet Union, in addition to having formed a treaty of nonaggression with Germany, had not attacked Poland on 17 September 1939, but had kept the eastern half of Poland as a buffer state between the USSR and Germany, for insurance’s sake, and instead had made agreements with China in secret to enter the Sino-Japanese war, and escalated its war with Japan, either without a cease-fire, or resumed the war after it, then Japan would be stuck in a hard place.
I believe that the reason the USSR didn’t respond with a massive counteroffensive in the east against Japan, with an alliance with China, was because the USSR simply didn’t have any more territory in the east into which to expand, for to take Chinese territory in Manchuria and mainland China that Japan had occupied would make enemies of both nations. The USSR wasn’t looking to “liberate” Chinese territory from Japan, since the cost of doing so wouldn’t result in any territorial gain…and taking Chinese territory for itself would lead to a war between both China and Japan, or some other ugly and complicated situation.
The USSR didn’t have anything to gain, but Japan had the land it had occupied in mainland Asia to lose, if the USSR entered into an alliance with China. The continuation of the Soviet-Japanese war in 1945 can be taken as tentative evidence that if Germany hadn’t later invaded the Soviet Union, the conquests achieved in Japan at heavy human and material costs were always at the mercy of Soviet forbearance.
Japan’s foresight was much worse than its hindsight, perhaps. It managed to start wars with two nations that were powerful enough to defeat it alone and made strategic and geopolitical errors at every stage of escalation of the war that were too great to overcome with tactical and operational excellence and the courage of its soldiers.
Its two greatest mistakes, in my opinion, was its failure to recognize that Communism, while an ideology that it hated, was one also to be feared, and that the United States was a nation that just shouldn’t be attacked, and that the third term of President Roosevelt meant that it was a time when the US was preparing for anything, a recognition that the times were exceptional and that it expected the worst, but hoped for the best.