mustard gas
About 416,800 U.S. soldiers died in World War 2.
11,900 New Zeland Soldiers were killed during World War 2.
5.53 Million German Soldiers were reportedly to be killed during World War 2.
a large number of people died of sickness in WW1, there is no exact answer to this question
Bullets.
383,800 British Soldiers were killed during World War 2.
Around 40,000 Scottish Soldiers were killed during World War 2.
50,000 were killed and 230,000 were wounded
1,808,000
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The exact number of Russian soldiers killed during the First World War is unknown. It is estimated that the Russian Empire lost anywhere from 1.7 million to 2.2 million soldiers.
The total was 13 million soldiers killed and 17 million civilians killed