Reconstruction was a success in that it restored the United States as a unified nation: by 1877, all of the former Confederate states had drafted new constitutions, acknowledged the Thirteenth, Fourteenth, and Fifteenth Amendments, and pledged their loyalty to the U.S. government.
<span>The Russian Revolution was a pair of revolutions in Russia in 1917, which dismantled the Tsarist autocracy and led to the eventual rise of the Soviet Union</span>