It was especially hard for the south to rejoin with the Union. The reconstruction happened after the Civil War. It went on from 1865-1877. There were intense controversies. It causes the impeachment of a President. There were many racial outbreaks. They passed several Constitutional Amendments. Even the end was very controversial. The biggest issue was bringing the nation back together. The issue wasn't only political and social, but also physical. destruction. The infrastructure also had to be rebuilt. The reconstruction was also very severe.