Why were civil rights challenged during the Cold War as they had during World War I & The “Red Scare” of the 1920’s?

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?

The most important units of the english armies which fought during the hindred years war were composed of

Explain how republicans gained control of southern state governments?