That's not what I said.
I said China always has the option of annexing Mongolia if the U.S. Navy cuts off China's Middle Eastern oil. That is very different from what Japan did. Under this scenario, the U.S. is responsible for China's annexation of Mongolia.
1. U.S. chokes off China's Middle Eastern oil. The U.S. knows full well that China will have to acquire another supply of energy.
2. China annexes barely populated Mongolia out of the need to survive. If you have no food (or energy), you are justified to secure a supply of food (or energy).
3. U.S. chokehold on Chinese Middle Eastern oil leads to the predictable result of Chinese annexation of Mongolia. Thus, the U.S. forced China's annexation of Mongolia. The U.S. is responsible.
Do you follow the logic?