The middle class I'm pretty sure
The Russo-Japanese War developed out of the rivalry between Russia and Japan for dominance in Korea and Manchuria. In 1898 Russia had pressured China into granting it a lease for the strategically important port of Port Arthur (now Lüshun), at the tip of the Liaodong Peninsula, in southern Manchuria.
Answer:
It resulted in the United States and the Soviet union developing into the world’s most powerful state. A in short.
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Answer:
Europeans exploring and settling North America in the 16th and 17th centuries brought smallpox, measles and influenza, diseases usually associated with domesticated livestock. Native Americans, who generally were in better health than Europeans, did not keep livestock and had no immunity to these diseases.
Explanation:
The end of the Vietnam war created the crisis of confidence because the nation did not trust the government for not pushing them into unwanted conflicts.
Explanation:
The end of the Vietnam war created the crisis of confidence that had not been there for the whole existence of US as till then the people had barely ever been against the nation when it went to war.
The world wars were entered with public consent and wide public support.
The Vietnam conflict was not explainable to public so they began losing their trust because the nation did not trust the government to make the right decisions for them anymore.