Answer:
The Communist would have been defeated
Step-by-step explanation:
The Communist Party in China can comfortably say thank you to the Japanese because if it wasn't for their occupation, the Communists would have been destroyed. The Japanese attacked and invaded the parts of China that had the most resources and the most population, which accidentally was actually the home-ground of the Nationalists. The Japanese managed to weaken the Nationalist to such a degree that once they left, the Nationalist were relatively easily overtaken by the Communists. If Japan didn't invaded though, the Nationalist would have crushed the Communist, and the main reasons for that are that the Nationalists had much more resources, larger military forces, better equipment, and were much better off economically.