It wasn't so much the Civil War, but the expansion of the United States that led to the Civil War, that brought about the Second Industrial Revolution, since this expansion brought a need for massive amounts of railroad materials.
I would say the extermination of the buffalo was a key factor in the routing of the Plains Indians from the Great Plains during the Red River War by the federal troops because these First Nations people depended very much on the buffalo for food, fuel, clothing and construction materials. Pemmican for example was made partly from buffalo meat.
The Antifederalists and Federalists were the first faction to disagree on this matter during the ratification of the Constitution. They feared a federal government would oppress their civil liberties and freedom the revolutionaries had so dearly fought for. However, from there grew the first political system. This ultimately paved the path for a system of parties to become integrated in the democratic government and discuss this issue. Parties argued over the institution of slavery and territorial expansion which ultimately led to clarify exactly what role the federal government had over the states. North Carolina came with a nullification act to secede backed up by their social contract. It failed after they had been the only ones to carry this out. Later many southern states had a lot of autonomy and felt like they should secede after issues of who held the ultimate power.
These codes appeared to be designed to keep African-Americans in a situation similar to slavery. African-Americans were frequently required to sign annual labor contracts. Those who do not comply risk being arrested and forced into involuntary servitude.
After slavery was abolished during the Civil War, black codes were enacted to limit African Americans' freedom and ensure their availability as a cheap labor force.
The laws were passed in 1865 and 1866 to replace the social controls of slavery that had been removed by the Emancipation Proclamation and the Thirteenth Amendment to the Constitution. The black codes had their origins in the previously in force slave codes.
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The goal of containment (Truman Doctrine) was to box in the Soviet Union to prevent them from effectively spread communism.