Not in the past century.
1000 years
The Vietnamese country was totally infiltrated by the Chinese and the Chinese ambitions to have Vietnam as their seaport. That's why the Vietnam War began --to contain Chinese influence.
to provent a communist takeover
He wanted to prevent a Communist takeover of Southeast Asia
He feared a communist takeover in Southeast Asia if the United States left Vietnam.
Third Chinese domination of Vietnam ended in 906.
Fourth Chinese domination of Vietnam was created in 1407.
Fourth Chinese domination of Vietnam ended in 1427.
China, Korea, Vietnam, Cuba, Indochina
Yes, the Chinese ruled Vietnam for 1,000 years until 939 AD, China was defeated by Vietnam and had lost control over Vietnam. Vietnamese soldiers and civilians in Vietnam were ruled by chinese soldiers and then finally the vietnamese soldiers fought back against the chinese soldiers and China lost the significant battle against Vietnam.
France
The 1949 communist victory in the Chinese Civil War heightened American fears of the spread of communism in Asia, leading to the "domino theory," which posited that if one country fell to communism, neighboring countries would follow. This belief prompted the U.S. to increase its support for anti-communist regimes in Southeast Asia, including Vietnam. Consequently, the U.S. escalated its military and financial involvement in Vietnam to prevent a communist takeover, ultimately leading to deeper engagement in the Vietnam War.