Reconstruction refers to the process by which?

Reconstruction refers to the period after the Civil War from 1865-1877. Also refers to the process of readmitting the Southern states back into the Union. Process of rebuilding the South, both by physically rebuilding cities, towns, etc.

The term reconstruction refers to the period of time, 1865-1877, in which the Southern states were not only welcomed back into the Union, but they were also rebuilt and improved.

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it increase by 12% a year from 1812-1820