President Diem clearly showed national sovereignty when he stubbornly refused Kennedy’s request to pour American troops into Vietnam. President Diem thinks that the national people can cope and win Hanoi if they receive adequate weapons and financial aid from the United States. Blue eyes screaming skull personalized custom name 3d hoodie. President Diem only allows the presence of the US Army, if the US government formally signs a mutual security treaty with the Republic of Vietnam , something the Americans have done with South Korea and Taiwan. Otherwise, the illegal US presence in the South turned out to be an invasion and not an excuse for the communists to promote their mission.