The major reason for the war was the status of slavery, particularly its extension into areas obtained as a result of the Louisiana Purchase and the Mexican–American War.
The government had abandoned the gold standard and was manufacturing greenbacks for the first time to help pay for the Civil War. The new notes needed to be cut and tallied, so Spinner, a determined bureaucrat on a tight budget, turned to an untapped labor pool willing to work for less than the going wage women.
This is how the federal government began to transform itself into a national warfighting army. The Civil War and its wartime Congresses gave rise to many of the contemporary federal government's cornerstones.
For the first time, the government issued bonds, and Congress established the first national banking system. The Agriculture Department was established to assist farmers. To bury the Union dead, a national cemetery system was established.
Thus Civil war is the correct answer for the following question.
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