In hindsight, we should have palled with the Japs in the 1920s to try to destabilize the Soviet Union.
Imperial Japan never could have been the threat that the ChiComs now are.
No kidding, and then after WW 2 we let Communism take it over. The only reason we were worried over Japan vs China, was it was Britains former playground and minion. The early 20th century Presidents coveted Britains Empire, and we have spent many trillions of dollars trying to recreate it, and even improve on it. It has been a disaster.