"The Versailles Treaty failed to note Japanese occupation of the province of Shandong, despite prolonged Chinese protest on the issue, and resulted in continued Japanese occupation, hence China refused to acknowledge the Treaty. Perhaps the Allied powers were too preoccupied with European issues, or they thought prudent to interfere with Japanese affairs when Japan proved to be an ally in WWI, either way the result was Japan was able to use Shandong as the landing point in their invasion of China prior and during WWII. ""The war that ends all wars"" merely set up the stage for WWII."
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