The amendments to the Constitution that are commonly known as the Civil War Amendments are the 13th, 14th, and 15th Amendments. These amendments were passed in 1865, 1868 and 1870 respectively in reaction to the Civil War, its causes, and its aftermath. These amendments together give African Americans the same legal status and rights as whites enjoy.
Briefly, the 13th Amendment prohibits slavery. The 14th Amendment mandates that all citizens of the US must enjoy the "equal protection of the laws." The 15th Amendment states that blacks cannot be prohibited from voting due to their race or to the fact that they were once slaves.
The Thirteenth Amendment, 1865 abolished slavery and involuntary servitude. It completed the task of the Emancipation Proclamation. The Fourteenth Amendment, 1868 made the former slaves citizens. It provided for equal protection of the laws for all citizens. The Fifteenth Amendment, 1870 provided the right to vote for Black males.