Why is Vietnam referred to as the "working class" war?

It was a "working-class" war because mainly lower class whites or minorities fought. They were unable to come up with reasons to escape the war because they were less privileged economically.

Explanation:

Working-Class War follows American soldiers in Vietnam essentially from childhood, through combat, and to their lives after their service. .At basic training, young men were transformed into soldiers through an often brutal process that encouraged directed aggressiveness and discipline.