The Taiping Rebellion, a civil war affecting southern China, began in December of which year?

The Taiping Rebellion, also known as the Taiping Civil War or the Taiping Revolution, was a massive rebellion or total civil war in China that was waged from 1850 to 1864 between the established Manchu-led Qing dynasty and the Taiping Heavenly Kingdom under Hong Xiuquan.

The Taiping Heavenly Kingdom was an oppositional state based in Tianjing (present-day Nanjing) with a Christian millenarian agenda to initiate a major transformation of society. A self-proclaimed convert to Christianity and brother of Jesus Christ, Hong Xiuquan led an army that controlled a significant part of southern China during the middle of the 19th century, eventually expanding to command a population base of nearly 30 million people.

Devolving into total war—with any and all civilian-associated resources and infrastructure as legitimate military targets—the conflict was the largest in China since the Qing conquest in 1644, and it also ranks as one of the bloodiest wars in human history, the bloodiest civil war, and the largest conflict of the 19th century, with estimates of the war dead ranging from 20–70 million to as high as 100 million, with millions more displaced.

The war was mostly fought in the provinces of Jiangsu, Zhejiang, Anhui, Jiangxi and Hubei, but over 14 years of war the Taiping Army had marched through every province of China proper except Gansu.