What amendment guaranteed rights of freedom and citizenship and suffrage for African-Americans after the Civil War?
13th and 14th admendments look in the admendments in the constitution
note that the 13th amendment merely abolishs slavery.
The 14th is the amendment that gives citizenship.
Contitutional amendment #14 is as follows:
All persons born or naturalized in the United States, and
subject to the jurisdiction thereof, are citizens of the United
States and of the State wherein they reside. No State shall make or
enforce any law which shall abridge the privileges or immunities of
citizens of the United States; nor shall any State deprive any
person of life, liberty, or property, without due process of law;
nor deny to any person within its jurisdiction the equal protection
of the laws.
The 15th amendment helped African Americans vote in elections.