While the rest of the world was off having a couple of World Wars, China was busily uprooting the dynastic system that had ruled there for a millennia. In 1911 and 1912, Chinese nationalists brought 3000 years of dynastic rule to an end. China plunged into chaos as warlords staked out regions of the country for themselves. The nationalists and communists joined forces briefly to bring the nation back together under the Chinese Republic, and then they quickly split and started fighting the Chinese Civil War. The fight between nationalists and communists went on for decades and was interrupted by an alliance to fight the invading Japanese during World War II. After World War II ended, the Chinese Civil War was back on. Part of the "Crash Course World History" series.