This statement is completely true, the native peoples to the Americas were introduced to diseases such as smallpox which wiped out a majority of the populations. While battles and such took place this was a huge cause of change because of the effectiveness. Positively, however, the natives were also introduced to the trading of European goods such as foods, guns, and livestock, and particularly horses.
Answer:
The Red Scare was hysteria over the perceived threat posed by Communists in the U.S. during the Cold War between the Soviet Union and the United States, which intensified in the late 1940s and early 1950s.