The Reconstruction Era lasted from the end of the Civil War in 1865 to 1877. Its main focus was on bringing the southern states back into full political participation in the Union, guaranteeing rights to former slaves and defining new relationships between African Americans and whites. While very little fighting occurred on Iowa soil and Iowa had never legalized slavery, black migration of former slaves into the region and the national focus on civil rights forced Iowa to reconsider its own racial relations.
When southern states seceded from the Union, they withdrew their representatives from Congress, leaving both the Senate and the House under the control of the North. While most white Americans still held views that whites were superior to African Americans and were not yet ready to integrate society, many were sympathetic to the plight of freed slaves and wanted to promote their welfare. On the political front, Republicans were eager to give African Americans the right to vote because they anticipated that African Americans would strongly support them at the polls.
To achieve these goals, Republicans needed to amend the U.S. Constitution, a process that requires approval of two-thirds of each chamber of Congress and ratification by three-fourths of the states. Republicans felt an urgency to get these measures approved before southern congressmen returned to Washington, D.C., who could block the process. In 1865, Congress passed and states approved the 13th Amendment to the Constitution prohibiting slavery. In 1868, the 14th Amendment was ratified granting "equal protection of the law" and "due process" to all citizens to prevent southern states from passing laws that would discriminate against African Americans.
The Iowa legislature, controlled by Republicans, approved both amendments. Even though there was some opposition to measures that looked as if they were moving toward racial equality, Iowa Republicans realized they could not impose on the South restrictions that they were not willing to support at home. Before the Civil War, African Americans were denied the right to vote in northern as well as southern states. Iowa was no exception. The 1857 Constitution restricted suffrage to white males 21 years of age and over. Changing the state constitution required an affirmative vote on a referendum. In 1868, two years before the 15th Amendment prohibited denying the vote to anyone based on "race, color or previous condition of servitude" (slavery), the Iowa legislature submitted to the voters (all white males at the time) an amendment to strike the word "white" from voting requirements. The measure won a majority, and African-American males in Iowa could vote. In 1870, when the 15th Amendment came to the states ensuring African-American suffrage nationwide, Iowa became the 29th state to approve it, providing the final state necessary for passage.
The suffrage amendment was controversial on several fronts. Many white voters, primarily Democrats, opposed measures that brought African Americans more fully into mainstream society. Advocates for women's suffrage were very disappointed that the measure stopped with African Americans male only — suffrage, leaving all women out of the voter pool. Some Republican leaders urged the suffragists to wait their turn: "This is the black men's hour." And wait the women did. Women did not achieve full suffrage for another half century.