The correct sequence of events that led to the Communist Revolution in China is:
- Nationalists overthrow dynastic rule.
- Communists help nationalists secure the cities.
- Nationalists purge the communists.
- Communists and nationalists fight the Japanese and each other.
- Communists overtake the nationalists after WWII.
This sequence captures the historical context and major events that led to the rise of the Communist Party in China and the eventual establishment of the People's Republic of China in 1949.