What were the major political changes freed slaves during reconstruction period?

During the Reconstruction period, major political changes for freed slaves included the passage of the 13th, 14th, and 15th Amendments to the Constitution, which abolished slavery, granted citizenship rights, and prohibited denial of voting rights based on race. Freed slaves gained the right to participate in government, hold political office, and shape policies impacting their communities. These changes marked significant progress towards equality and civil rights for African Americans in the United States.