President Andrew Johnson:
Term: 1865 - 1869.
He was the 17th president of the United States.
He was impeached and tried by the Senate, but was acquitted by one vote.
He was the only southern senator to stay loyal to the union.
President Ulysses S. Grant:
Term: 1869 - 1877
He was the 18th president of the United States.
He enforced civil rights laws and fought Ku Klux Klan violence.
He encouraged the passage of 15th amendment, which gave suffrage for black men.
He used the army to build the Republican Party in the South.