The technological innovations shown in these photos made war much more deadly.
You included no options but the technologies shown above served to make wars much more deadly such that many more people died and wars lasted for a prolonged period of time.
They made wars deadlier because:
- planes were able to drop bombs on soldiers and civilians thereby killing many more people
- gas masks enabled armies to be able to launch chemical attacks against their enemies knowing that they were protected.
- tanks were able to penetrate defenses and unleash bombs which killed many more soldiers.
We can therefore conclude that all these inventions served to make war much more deadly than it normally was.
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