@BillRM,
The Federal government was spending more than $2,000,000
an hour hour in the 1940s, so the comparison remains valid. The scale of Federal spending in World War Two exceeded the scale of the spending in the Civil War by orders of magnitude. During the American Civil War, there was no Tennessee Valley Authority (essential to the Manhattan Project in the beginning, by the way), there was no Social Security Administration, there were no labor unions and no Commerce Department or Labor Department. There was no army air force, there was no submarine service in the United States Navy, the total of United States Marines in 1862 could be measured in thousands while in the Second World War, by 1943 there more than a quarter of a million Marines on service at any given time. The total of the armed forces of the United States in 1862 was one and one half million, which included all the services as well as all members of state militias. The total of all branches of service in the Second World War was 15,000,000, and the population of the United States in 1942 was
not tens times greater than it was in 1862. In fact the total population of the United States at the time of my birth, after the Second World War was not ten times that of the United States in 1862.
But you have avoided the point altogether, which is that Federal spending in the American Civil War
was not responsible for the economic prosperity of the United States in the years following the war.
Shame on you.