Throughout the world's history wars have been fought on different issues. Wars in themselves are disastrous but they are certain wars that cause massive casualties. Here, I am going to discuss the top 10 deadliest wars in the history of the world.

Top 10 deadliest wars in the history of the world

10. Napoleonic Wars

Napoleonic wars

War Duration: 1803-1815

War Belligerents:

Napoleanic War was fought between the Napoleanic French Empire and the European coalition. It is the tenth deadliest war in history.

War casualties: 

Approximately 7 million people were killed during the war.

How the war had started?

Napoleonic wars were a sequel of wars that were started when the Napolean French revolution tried to revolutionize the European army. The war spread also in the Atlantic, Indian, and Pacific oceans. Initially French Empire, headed by Napolian, achieve massive victory against the European coalition but declined when France invaded Russia.

War Results: 

Napolean French empire suffered a massive defeat at the end of the war due to which the Bourban Monarchy was restored in France.

See also: Top 10 oldest cities in the world

9. Chinese Civil War

Chinese civil war

War Duration: 1927-1950

War Belligerents: 

The war was fought between two Communist parties and the Kuominatng Party of the Republic of China.

War casualties: 

The war ended with approximately 9 million casualties.

How the war had started?

Chinese civil war, a ninth deadliest war in history, started between communist and Non-Communist parties of Republican order to get control. At the end of the war, the Chinese Communist Party get control of Mainland China.

War Results:

The war ended with the huge victory of the Chinese communist party. China bifurcated into two states Republic of China(Taiwan) and the People's Republic of China.

8. Russian Civil War

Russian civil war

War Duration: 1917-1921

War Belligerents: 

Russian civil was fought between the different parties inside Russia.

War casualties: 

Russian civil war created 8 million casualties.

How the war had started?

Russian civil war was started between different parties inside Russia. Groups inside Russia were formed against the Bolshevik government. It was claimed that these groups were supported by foreign nations. The war became the reason for the formation of the Soviet Union. The Soviet Union conquered entire Russia.

War Results: 

The Soviet Union was formed under the majority of the Bolshevik Party.

7. The Dungan Revolt

The Dungan Revolt

War Duration: 1862-1877

War Belligerents: 

The Dungan Revolt engaged the military and civilians of Western China.

War casualties: 

The Dungan Revolt ended with almost 12 million casualties. It is considered as seventh deadlest war in the history of the world.

How the war had started?

The war was started near the yellow river. It was a conflict between the military and civilians of western China without any particular reason. The war was also known as the minorities War and it was fought during the regime of the Tongzhi Emperor of the Qing Dynasty.

War Results: 

The War ended with massive casualties and also a large number of people migrated towards Russian states such as Kazakhstan and Kyrgyzstan.

6. The Qing Conquest of the Ming Dynasty

War Duration: 1616-1662

War Belligerents: 

The war was fought between two dynasties inside China, The Qing dynasty and the Ming Dynasty.

War casualties: 

The war ended with 25 million casualties.

How the war had started?

The Qing Conquest of the Ming Dynasty is the sixth deadliest war in the history of the world.  Manchu clan Aisin Gioro replaced the Ming dynasty in northern China with the Qing dynasty. Qing dynasty also known as the Manchu dynasty was the last dynasty of China. Later on, it was replaced by the Republic of China.

War Results: 

The war ended with the replacement of the Ming Dynasty with the Qing dynasty.

5. Lushan Rebellion

War Duration: 755-763

War Belligerents:

Lushan Rebellion was a revolt between the Tang dynasty and Yan dynasty in China.

War casualties: 

Lushban Rebellion is responsible for the 36 million casualties.

How the war had started?

Lushan Rebellion is considered the fifth deadlines war in the world's history. The conflict was started between the Tang dynasty and ex-Tang general Lushan. Lushan wants to replace the Tang dynasty with the Yan dynasty in northern China.

War Results:

The Tang dynasty got a victory against Lushan Rebellion.  

4. Second Sino-Japanese War

Second Sino-Japanese war

War Duration: 1937-1945

War Belligerents:

Second Sino-Japanese war was fought between China and Japan.

War casualties: 

War ended with the death of approximately 25 million casualties.

How the war had started?

The second Sino-Japan war was the fourth-deadliest war in history of the world. It was an armed dispute between both countries. The war started when Japan tried to expand its control on the Asia region where a lot of resources are present. The war was later merged with World War II after Japan attacked Pearl Harbor. It was responsible for a lot of casualties and mass destruction.

War Results: 

The war was ended with the victory of China.

3. First World War (WWI)

First World War(WWI)

War Duration: 1914-1918

War Belligerents: 

First World War(WWI)  was fought between Allies and Central Power.

Allies include British, France, Russia while the Central power includes Germany, Italy, and Austria-Hungary.

War casualties: 

World War I ended with 60 million casualties.

How the war had started?

WWI, the third deadlines war in history, was started between Allies and Central Power. It was fought in Europe. The first world was remembered in history because a lot of new equipment were used such as machine guns, chemical weapons, and airplanes.

War Results:

The first world war was ended with the defeat of Germany, Austria, Italy, and Hungary. It causes the mobilization of a large number of Europeans. It is also responsible for the fallen of the Ottoman Empire 

2. Taiping Rebellion

Taiping Rebellion
(Deadliest war in China)

War Duration: 1851-1864

War Belligerents: 

Taiping Rebellion was a conflict between the Qing dynasty and Taiping rebellions inside China.

War casualties: 

Taiping Rebellion was the second deadliest war that ended with the death of 55 million people.

How the war had started?

Taiping Rebellion is one of the deadliest wars in the world's history. The conflict was raised between the Qing dynasty and Taiping rebellions in China over economic issues. Taking rebellions occupied the region of the Yangtze River for more than a decade. It is also the deadliest war in China.

War Results:

The war ended with the defeat of the Taiping Rebellions. Qing dynasty gain victory but still the war weakened the political structure of the dynasty.

1. Second World War (WWII)

World War II
(Deadliest war in World)

War Duration: 1939-1945

War Belligerents: 

World War II, a global war, was fought between Allies and the Axis. Axis include Germany, Italy, and Japan while Allies include France, Soviet Union, Britain, USA, and China.

War casualties:  

World War II was the deadliest war in history with an estimated 70 million casualties.

How the war had started?

World War II is the deadliest war in the world. The war was fought between the great powers The Allies and the Axis. The war started when Germany, headed by Hitler, invade Poland and in response, France and Russia attacked Germany. Later on, it spread all over the world. The war was also remembered due to Hitler's holocaust, genocide, and the use of nuclear weapons.

War Results:

The war ended with the expansion of the Soviet Union's control to Europe and the formation of a communist government inside China. Also, it shifts the Superpower tag towards the USA.