During the 1960s the escalation of the United States involvement in the Vietnam war was based on the belief that?

the government thought that if one country fell to communism, then all of asia eventually would too. they called it the domino effect. They stayed so involved with Vietnam because of this theory. it only ended when the people got tired of war and started realizing they were supporting a war they wouldn't win.

because the vietnam war was fought in an especially brutal and untraditional way

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.