The Reconstruction Amendments are the Thirteenth, Fourteenth, and Fifteenth amendments to the United States Constitution, adopted between 1865 and 1870, the five years immediately following the Civil War. This group of Amendments is sometimes referred to as the "Civil War Amendments" or the "Three Reconstruction Era Amendments".
The Amendments were important elements in implementing the Reconstruction of the American South after the war. Their proponents saw them as transforming the United States from a country that was (in Abraham Lincoln's words) "half slave and half free" to one in which the constitutionally guaranteed "blessings of liberty" would be extended to the entire male populace, including the former slaves and their descendants.
The Thirteenth Amendment (both proposed and ratified in 1865) abolished slavery. The Fourteenth Amendment (proposed in 1866 and ratified in 1868) included the Privileges or Immunities Clause, Due Process and Equal Protection Clauses. The Fifteenth Amendment, (proposed in 1869 and ratified in 1870 under the presidency of Ulysses S. Grant) grants voting rights regardless of "race, color, or previous condition of servitude"