Americas president is Joe Biden
Answer:
Inventions like the airplane and machine gun
Explanation:
World War I was so deadly because all of the new weapons that were invented. New technology that was being invented such as machine guns and mustard gas made war deadlier than every war before.
It had been many wounded soldiers. Each side gathered up their wunded and dead soldiers, and buried the dead.
The English had a poor relation with the natives because of the distinct cultural differences.
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