The Red Scare started directly following the end of WW1 in 1917. The conflict was between us the socialists who repersented white against the communists which repersented red therefor gaining the era of The Red Scare.
For those who are not aware of what or who the communists are, they first formed in Russia where the lower class people didn't own nothing awhile the middle class own farms, land, and a house. So the communists formed for the lower class to overthrow the middle class and divide the land equilly awhile in United States the laws are right to own privite property so United States were afraid that the communists will travel to United States and mess socity up and indeed they did. In response to that our government would prosacute anyone who is or thought to be a communist