The Vietnam war brought us modern warfare.
Originally they planned to hit china, thought they would stop at that little island first.
Then they realized they can have people running in circles and keep having the funding coming right on in.
No need to go into china, they learned they could keep the conflict going and keep bringing in the monies.
Hence modern warfare like they do now, milk the shit of a conflict turns into a occupation, keeps people moving in circles, endless wars.