Answer:
The main damange that the arrival of Columbus caused to the Native American civilizations was the spread of Eurasian diseases like measles or viruela, for which the Native Americans did not have antibodies.
These diseases were very contagious, and quickly spread among the Native populations all over the Americas, from Canada to South America, killing about 90% of the pre-columbian population.
Explanation:
a )they help historians focus on the effect of one important idea on different societies over time
Checks and balances operate throughout the U.S. government, as each branch exercises certain powers that can be checked by the powers given to the other two branches. ... Within the legislative branch, each house of Congress serves as a check on possible abuses of power by the other.
Answer:
Japan joined the Axis countries
Japan barred trade with the US.
Japan continued its expansion into China.
Explanation:
should help
