Strange, it never occurred to the political leadership at that time, that we could do business with the Commies. President Ike thought if the Commies took over that area we'd lose access to their tin, tungsten, rubber from Malaysia, then oil down in Indonesia.
Let's put the so called Vietnam War into context and consider the employment and economic situation at that time in the US.
This was a time when "baby boomers" were readying to enter the work force and jobs were scarce.
Civil Rights legislation had been passed and the Black unemployment rate was at 23%.
These people needed jobs. A Military Draft was instituted and took almost 2 million young men out of the unemployment equation. But, this was not the only economic benefit of escalating the role in Vietnam from advisory to combat.
These newly "employed" young men were going to need full combat gear....... time to crank up the mighty Military Industrial Complex, again. Even more people were put to work. New uniforms, new boots, and above all, new weapons were needed. All of which, including the young men, were expendable....replaceable. There was much profit and employment to be gained in the replacement of destroyed planes, ships, helicopters, bombs, and spent ammunition, and, yes, even young men killed in action.
For, their families received a penance, in the form of insurance money, much of which was put right back into the economy.
Then the "Vietnam War" begins to look like more a part of an economic policy that a war.
Of course, this is all merely conjecture on my part, as I cannot possibly provide any magnitude of proof of the content.
But, just perhaps, it does offer an alternative and plausible explanation of why a Nation would enter into a military conflict with absolutely no intention of winning.
Or at the very least, food for thought.