Due to the domino theory, the United States was concerned about Vietnam because Vietnam had become the most powerful democratic nation in Asia. if Vietnam turned to communism, nearby nations might follow. Vietnam was offering economic aid to other nations to spread communism. if Vietnam became independent, the US would lose its hold on the region.

la segunda guerra mundial comenzó el 1 de septiembre de 1939 y terminó el 2 de septiembre de 1945. ¡espero que esto ayude!

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.