Because of the discovery of gold in San Francisco in 1848, many people began moving west to search for wealth and fame. The United States was discovering many things underground...gold, silver, and oil. These were some of the natural resources the United States had at the end of the 1800s.
Biological warfare was effective against the Inca because there immune system's were not used to that type of diseases that Europeans brought over. There are very susceptible to disease and were wiped out quickly
Answer:
A. Attacks on trenches were deadly.
C. Defensive weapons were better than offensive ones.
D. Trenches were designed for defense.
Explanation:
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