If "post war red scare" is referring to "post WW2...", there was no "Main...factor(s)..." leading to the "red scare." There was only ONE factor: Nuclear weapons. Ghengis Khan never had those weapons, Napoleon never had those weapons, Rome never had those weapons...and neither did Adolph Hitler or Imperial Japan! For the first time in the history of the human race, we now had a weapon(s) that could extinguish mankind. This wasn't some super battleship, or complicated chemical warfare weapon, or even some new super bomber like the B-52 Stratofortess...this was "The Bomb!" And the "Red's" had it too! That was the RED SCARE.
Various international and domestic conditions led to the Red Scare. Primarily, it was due to the Bolshevik Russian Revolution of 1917.
the established a federal court
Leading the Red Scare.
Leading the Red Scare.
McCarthy
What steps do harry Truman take during the red scare to address public concern about domestic communism
The red scare came in the wake of World War I. It showed an excessive fear leading to violations of individual rights.
A revolution in Russia
The red scare came in the wake of World War I. It showed an excessive fear leading to violations of individual rights.
my balls
The Red Scare was people being worried about communist take over of the United States. There was one Red Scare in the 1920s and one in the 1950s.
truman directed security agencies to screen employees for signs of disloyalty