What caused the Red Scare and What was the impact the Red Scare on the United States

According to a source:

Red Scare Impact 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. (Communists were often referred to as “Reds” for their allegiance to the red Soviet flag.)

Hope this helps!

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.

b.lincoln had the victory he wanted for emancipation