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Deadliest Battles of All Time

Can you guess the 20 battles and sieges in history with the highest casualties?
For the purposes of this quiz, a battle is an extended conflict over an object or location of interest between two or more armed forces.
Extended operations like Operation Barbarossa (German invasion of USSR in WWII) are considered to be made up of several battles, but are not battles themselves.
Counting both military and civilian casualties.
Quiz by QuantumMechanist
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Last updated: January 11, 2024
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First submittedJanuary 31, 2022
Times taken1,442
Average score45.0%
Rating4.67
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Year
Casualties
Attackers
Defenders
Answer
1941-4
~5M
Germany, Italy, Finland
Soviet Union
Siege of Leningrad
1942-3
~2M
Axis Powers
Soviet Union
Battle of Stalingrad
1258
~2M
Mongol Empire (Ilkhanate)
Abbasid Caliphate
Siege of Baghdad
1945
1.3M
Soviet Union
Germany
Battle of Berlin
1941
1.2M
Germany
Soviet Union
Battle of Moscow
1938
1.1M
Japan
Chinese United Front, Soviet Union
Battle of Wuhan
1916
1M
French and British Empires
Germany
Battle of the Somme
1941
870k
Germany
Soviet Union
Battle of Smolensk
1916
750k
Germany
France
Battle of Verdun
1941
700k
Germany
Soviet Union
Battle of Kiev
383
700k
Eastern Jin Dynasty
Former Qin Dynasty
Battle of Fei River
1942
670k
Germany
Soviet Union
Battle of Voronezh
1944
550k
Germany
Soviet Union
Battle of Narva
1917
510k
British Empire, France, Belgium
Germany
Battle of Passchendaele
1944
500k
Germany, Hungary
Soviet Union, Romania
Siege of Budapest
1870-1
335k
German Confederation, Later Germany
France
Siege of Paris
1937
~330k
Japan
Chinese United Front
Battle of Shanghai
612
302k
Sui Dynasty
Goguryeo
Battle of Salsu
52 BCE
~300k
Rome
Gallic Confederation
Battle of Alesia
1945
~280k
United States
Japan
Battle of Okinawa
+3
Level 58
Feb 8, 2022
Thanks to Asterix and Eluveitie for "Alesia"...
+1
Level 67
Jan 10, 2024
Even though they dont remember Alesia :D
+2
Level 62
Feb 8, 2022
Good quiz, and quite sobering to think about.
+2
Level 64
Feb 8, 2022
I kind of expected more WWI battles, like Verdun, the Somme or Passchendaele
+1
Level 70
Feb 8, 2022
You're right. I looked into it, and it turns out my source mixed larger operations like Barbarossa with long battles like the Somme and Moscow.

So yeah, now there's a lot more WWI and WWII battles.

+1
Level 67
Jan 10, 2024
Minor detail that probably wont help anybody but Alesia was 52 BC and its looks like 52 AD here, maybe somebody will think about Vercingetorix then
+1
Level 70
Jan 11, 2024
Thanks, fixed.
+2
Level 73
Jan 29, 2024
Do you mind if I make one of these on a map? I was already working on a WWII one with a map.
+1
Level 70
Jan 29, 2024
Go ahead!
+2
Level 73
Jan 30, 2024
Thanks