The cause is taxes people did not want to pay taxes
Pax romana is the answer to your question. It was period of prosperity for Rome
The Militia Act<span> of 1862, 12 Stat. 597, enacted July 17, 1862, was legislation enacted by the 37th United States Congress during the American Civil War that allowed African-Americans to participate as war laborers and soldiers for the first time since the </span>Militia Act<span> of 1792.
There u go
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All recourses would be directed to the war effort on both fronts.