The American Civil War is generally estimated to have cost the US Government this much per day.
$3 million
$1 million
$2 million
$ 500,000
$2 million. In 1860 federal spending had declined from $84.8 million the previous year to $78 million. Then came the war. Fiscal year 1865, the year the war ended, saw a federal deficit of $963, and a total gross public debt of $2,681 million.