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.
Answer:
Spain
Explanation:
The Spanish–American War was an armed conflict between Spain and the United States.
Answer:
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<span>Hello!
The Battle of Yorktown marks the junction of French and American troops (led by Washington) against British rule.
Hugs!</span>