Conflict
|
Casualties
|
Battle
|
WW2
|
4.5 mill
|
Siege of Leningrad
|
Mongol Conquests
|
2.1 mill
|
Siege of Baghdad
|
WW2
|
1.29 mill
|
Battle of Berlin
|
WW2
|
1.79 mill
|
Battle of Stalingrad
|
WW1
|
714,231
|
Battle of Verdun
|
WW2
|
700,544
|
Battle of Kiev
|
2nd Sino-Japanese War
|
540,000
|
Battle of Wuhan
|
WW2
|
500,000
|
Battle of Manila
|
|
Conflict
|
Casualties
|
Battle
|
Chinese Civil War
|
425,000
|
Siege of Changchun
|
WW2
|
422,000
|
Siege of Budapest
|
2nd Sino-Japanese War
|
400,000
|
Battle of Shanghai
|
Spanish conquest of the Aztec empire
|
240,000
|
Siege of Tenochtitlan
|
WW2
|
200,000+
|
Warsaw Uprising
|
2nd Sino-Japanese War
|
200,000
|
Battle of Xinkou
|
Arab-Byzantine wars
|
170,000
|
Siege of Constantinople
|
WW2
|
133,813
|
Siege of Odessa
|
|
Conflict
|
Casualties
|
Battle
|
2nd Sino-Japanese War
|
130,000
|
Battle of Taiyuan
|
2nd Sino-Japanese War
|
120,000+
|
Battle of South Shanxi
|
2nd Sino-Japanese War
|
115,830
|
Battle of West Hubei
|
Taiping Rebellion
|
100,000
|
Third Battle of Nanking
|
Russo-Japanese War
|
100,000
|
Siege of Port Arthur
|
2nd Sino-Japanese War
|
100,000
|
Battle of Changde
|
First Balkan War
|
93,282
|
Siege of Adrianople
|
2nd Sino-Japanese War
|
84,862
|
Third Battle of Changsa
|
|