What is the cold war how did it lead us involvement in th korean war and vietnamese war

answer; i believe that the correct answer is (chronological order);

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.