The Deadliest War in this Century was in Congo

Super fact 95 : More than 4-5 million people died in Congo Civil War 1998 to 2003 and its aftermath (until 2007). In addition, some of the other of the deadliest wars in the 21st century are not well known.

Below : 21st Century death toll from different wars, current and recent.

The graphics include colored circles corresponding to 15 wars. The conflicts are Second Congo Civil war 4 million deaths, Syrian Civil War 600 thousand deaths, Second Sudanese Civil War 450 thousand deaths, Russo-Ukrainian War 415 thousand deaths, War in Darfur 400 thousand deaths, South Sudanese Civil War 380 thousand deaths, Mexican drug war 375 thousand deaths, Yemeni civil war 370 thousand deaths, War in Afghanistan 360 thousand deaths, Boko Haram 350 thousand deaths, Iraqi war 285 thousand deaths, Colombia 225 thousand deaths, Chechen 150 thousand deaths, Angola 100 thousand deaths, Israel-Gaza War 75 thousand deaths, Israeli-Arab Total 80 thousand deaths.
The number of deaths cited in the graphics above correspond to rough midpoint values of the estimates for the 21st century. K stands for one thousand deaths. The area of the circles corresponds to these midpoint estimates. See the list of conflicts under “Deadliest twenty first Century Wars”.

Notes on the graphics above:

  • The 16 wars included in the graphics above roughly correspond to the deadliest wars in the 21st century. However, a few of the wars included in the graphics are not among the 16 deadliest wars of the 21st century.
  • Some of the wars included above started in the 20th century. The number of deaths estimates corresponds to the portions that happened in the 21st century.
  • The number of deaths from the Congo Civil War include famine and plagues that resulted from the war.
  • I had a hard time finding an estimate for just the 21st century portion of the Congo Civil War. However, the vast majority of the deaths happened in the 21st century.
  • The death estimates for the Russo-Ukrainian War might be underestimated due to unreliable reporting by Russian authorities.
  • The Israeli-Gaza war may seem smaller than expected. However, media attention does not necessarily correspond to the size of the devastation of a conflict.
  • The estimate for the number of deaths for the current Iran-US-Israel war is between 3,600 to nearly 5,400 deaths, which is too small to be part of this post.
  • There are / were hundreds of wars and conflicts in the 21st century.

I consider this a super fact because it is true, an important history fact and despite the enormous losses in the Congo Civil War a lot of people do not know much about it and may not even have heard about it.

Photo by Safi Erneste on Pexels.com

Deadliest Wars in the Twenty First Century

  • The Second Congo Civil War 1998 to 2007. With an estimated 3 million to 5.4 million deaths. Read about it here, here, or here.
  • The Syrian civil war 2011 to 2024. With an estimated 580 thousand to 610 thousand deaths.
  • Second Sudanese Civil War 1983 to 2005. With an estimated 2 million deaths in total, with 300,000 to 600,000 deaths occurring in 21st century.
  • Tigray War 2020 to 2022. With an estimated 160 thousand to 600 thousand deaths.
  • War in Darfur 2003 to 2020. With an estimated 400 thousand deaths.
  • Russo-Ukrainian War 2014 to present. With an estimated 350 thousand to 480 thousand deaths.
  • Mexican drug war 2006 to present. With an estimated 350 thousand to 400 thousand deaths.
  • South Sudanese Civil War 2013 to 2020. With an estimated 380 thousand deaths.
  • Yemeni civil war 2014 to present. With an estimated 370 thousand deaths.
  • War in Afghanistan 2001–2021. With an estimated 360 thousand deaths.
  • Boko Haram insurgency 2009 to present. With an estimated 350 thousand deaths.
  • Iraqi war 2003 to 2017. With an estimated 270 thousand to 300 thousand deaths.
  • Colombian conflict 1964 to present. With an estimated 450 thousand deaths but with about half of those deaths happening in the intense fighting of the 21st century.
  • Chechen conflict 1994 to 2009. With an estimated 80 thousand to 230 thousand deaths, most  of those, 150 thousand, happening in the 21st century.
  • Angolan Civil War  1975 to 2002. With an estimated 800 thousand deaths many in the final years of the conflict with an estimated 100 thousand in the 21st century.
  • Burundian Civil War 1993 to 2005. With an estimated 550 thousand to 800 thousand deaths, many in the final years of the conflict with an estimated 50 thousand deaths in the 21st century.
  • The Arab Israeli conflict 1948 to present (multiple wars) . With an estimated 200 thousand deaths in total with 80 thousand deaths happening in the 21st century.
  • The Israel Gaza conflict (2023 to present). With an estimated 75 thousand deaths.

To read related posts of mine see “We are living in relatively peaceful times“ and “Deadliest Civil War Was the Taiping Rebellion”.




To see the other Super Facts click here

Deadliest Civil War Was the Taiping Rebellion

Superfact 93 : Around 20 to 30 million people died in the Taiping Rebellion, 1850 to 1864. It is the deadliest civil war in known history, the deadliest war in the 19th century, and the second deadliest war in all of known history. World War II was the deadliest.

The graphics show differently colored circles corresponding to selected large wars. World War II – 80 million, Mongol conquests – 45 million, Taiping Rebellion – 25 million, World War I – 18 million, Russian Civil War – 10 million, Chinese Civil War 7 million, 30 years’ war 6 million, Napoleonic Wars – 5 million, Second Congo Civil War 4 million, Vietnam War 2.45 million, American Civil War 0.7 million.
The number of deaths cited in the graphics above are rough midpoint values of the estimates. The area of the circles corresponds to these midpoint estimates. Note Mongol conquests correspond to multiple wars during a time period of 162 years. The ‘M” corresponds to millions.

The Taiping rebellion is estimated to have caused the deaths of 20-30 million people. However, some estimates estimate that as many as 70 million people might have died in the Taiping rebellion. The Mongol invasions and conquests cost 30-60 million lives, but they comprised many wars and took place during a time period of 162 years (1206 – 1368). Therefore, you typically don’t count that as one war. Also note that the estimate for deaths caused by World War I does not include the Spanish flu.

I consider this a super fact because it is true, an important history fact and despite the enormous losses in the Taiping rebellion, a lot of people have never heard of it.

Photo by jefe king on Pexels.com

Deadliest Wars

Illustration of Chinese warriors preparing outside a fortified city.
Taiping Rebels at Shanghai China in 1853-54. ‘Small Swords’ refers to daggers used by warriors or martial artists in close combat. 19th century print. Stock Illustration ID: 237232531 by Everett Collection.

The links above are from Encyclopedia Britannica and from Wikipedia. Also note that after the Napoleonic Wars entry I only listed wars that happened after World War II and resulted in around a million deaths. The exception is the American Civil War. The list would be too long otherwise.

The Taiping Rebellion

The Taiping Rebellion was a civil war in China between the Qing dynasty and the Taiping Heavenly Kingdom. The Taiping Heavenly Kingdom was a theocratic monarchy that tried to overthrow the Qing dynasty. It was led by Hong Xiuquan, a religious leader who believed he was Jesus younger brother. In the end the Qing dynasty prevailed but at a great cost.

A map of China in the 19th century. It shows the extent of the Taiping Heavenly Kingdom and how it shrunk.
A map showing the extent of the Taiping Heavenly Kingdom. The dark area is the extent towards the end. M.Bitton, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons.


To read a related post of mine with a different perspective see “We are living in relatively peaceful times“.



To see the other Super Facts click here