NATO, or the North American Treaty Organization, was formed in 1949. It was the policy created as a result of the expansion plans of the Soviet Union. It's main goal was to protect countries from the countries of the "Steel Curtain."
I believe the Long march took place in 1934 and 1935.
I think the answer to your question is Red Scare because I have never herd of the Red Smear before.
Answer:
The National Labor Relations Act.
I hope this helps you. ✧
