Events that were happening in the US during and after the Civil War include emergence of genocidal armies in the west, enactment of land grab policies, and rapid industrialization. The correct option is the last option.
The period following the Civil War is known as Reconstruction in US history. Reconstruction lasted from 1865 to 1877. The Union had won the war on the battlefield. This period was marked by efforts to readmit the Confederate states into the Union, to rebuild the nation, to help those states to rebuild in the face of the war’s near-total destruction of certain areas, to facilitate the re-enfranchisement of white voters in the eleven states, to determine and guarantee the rights of about four million freed slaves in the South, and to try to help ease human suffering somehow.
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