Answer:
they didnt contribute to the us they were slaves. Other than forced labor.
Answer:
From 1524-1525, then again from 1526-1528, he sailed with Almagro and a priest, Hernando de Luque, on voyages of discovery and conquest down the west coast of South America.
Answer: I believe it would be Sonar technology confirmed that the crust was moving
Explanation:
How did Winston Churchill's "Iron Curtain" speech impact the Truman Doctrine? Churchill's famous speech convinced many Americans that the USSR was an enemy rather than an ally, which led to the creation of the Truman Doctrine. ... The USSR needed to protect its western border from future attacks.