中國最大人口減少曆史：三國時代最慘，共黨的大饑荒榜上有名

The biggest population drops in China during wars occurred during the 

Three Kingdoms period (220-280 AD), the Taiping Rebellion (1850-1873), and the Mongol conquests. The Three Kingdoms period saw a population drop from approximately 

56.5

56.5

 million to 

16

16

 million due to warfare, plague, and migration. The Taiping Rebellion, combined with famine, caused a drop of over 

30

30

 million people between 1850 and 1873. 

 

Three Kingdoms period (220–280 AD) 

• Population decline: A significant drop from approximately 
  

  56.5

  56.5
   million to around 
  

  16

  16
   million.
• Causes: Warfare, plague (which killed many generals and officers), and mass migration of people fleeing the conflict contributed to the devastating loss. The decline also reflects a period of inaccurate census data due to the widespread chaos. 

 

Taiping Rebellion (1850–1873) 

• Population decline: A drop of over 
  

  30

  30
   million people.
• Causes: The rebellion, combined with related drought and famine, was the primary cause of the population decline. 

 

Mongol conquests (13th century) 

• Population decline: While a precise figure for China is difficult to ascertain, the initial phase of the Mongol conquests is often cited as one of history's most devastating periods.
• Causes: Massacre of city inhabitants, widespread destruction, and the requisitioning of food supplies by the invading armies led to massive death tolls in conquered regions, including China. 

 

Other significant population drops 

• Dungan Revolt (1862–1877): Caused an estimated 
  

  10

  10
   million casualties.
• Chinese Civil War (1927–1950): Resulted in an estimated 
  

  7.5

  7.5
   million casualties.
• Great Leap Forward (1958–1962): Although primarily a famine resulting from policy, it caused a massive population decline of over 
  

  18

  18
   million people due to its catastrophic effects.