They formed unions to solve their problems.
The tactics that the united states used to contain communism in the western hemisphere is :
Aggressive force: By placing our military forces in the region that are a threat of communism
Foreign Aid : By aiding the countries in need to earn their favour
hope this helps
U.S. Supreme Court Justice Earl Warren delivered the unanimous ruling in the landmark civil rights case Brown v. Board of Education of Topeka, Kansas. State-sanctioned segregation of public schools was a violation of the 14th Amendment and was therefore unconstitutional.
Good history research can be found on history archives. It’s a government website so it would be approved by teachers. I learned a lot from there and just studying :). Hope this helps.