D.it had many military camps where troops could be trained .
The Vietnam War severely damaged the U.S. economy. Unwilling to raise taxes to pay for the war, President Johnson unleashed a cycle of inflation. The war also weakened U.S. military morale and undermined, for a time, the U.S. commitment to internationalism.
DescriptionPer capita income or average income measures the average income earned per person in a given area in a specified year. It is calculated by dividing the area's total income by its total population. Per capita income is national income divided by population size. Wikipedia