The Taiping Rebellion, also known as the Taiping Civil War, Revolution, or Movement, was a civil war in China between the Qing dynasty and the Taiping Heavenly Kingdom. The conflict lasted 14 years, from its outbreak in 1850 until the fall of Taiping-controlled Nanjing—which they had renamed Tianjing —in 1864. The last rebel forces were defeated in August 1871. Estimates of the conflict's death toll range between 20 million and 30 million people, representing 5–10% of China's population at that time. While the Qing ultimately defeated the rebellion, the victory came at a great cost to the state's economic and political viability.