during the 1960s, United states were involved in a cold war with the soviet union.
At that time, Vietnam was seen as a proxy that could deepen either the soviet union or united states influence in south east Asia.
The president of the 1960s at that time believe that if we did not send our troops there, the soviet union would take control of the rest of the south east Asian countries. This is why majority of them favor the policies to intervene with the Vietnam government,.
Is estimated to have killed 30 to 60% of Europe's total population.<span>In total, the plague reduced the world population</span><span> from an estimated 450 million down to 350 to 375 million in the 14th century.</span>