Final answer:
The primary aim of the Enforcement Acts was to protect African American voters and enforce civil rights during the Reconstruction era, specifically by counteracting the intimidation and violence perpetrated by groups like the Ku Klux Klan.
Step-by-step explanation:
The main aim of the Enforcement Acts, passed between 1870 and 1871, was to protect African American voters and their civil liberties during the Reconstruction era. The First Enforcement Act, made it a federal crime to interfere with the right to vote, and was established, among others, to counteract the violent activities of groups like the Ku Klux Klan. The Second Enforcement Act created a federal mechanism to supervise all elections, and the Third Enforcement Act, also known as the Ku Klux Klan Act, allowed the president to suspend the writ of habeas corpus and to use the army to enforce the law.
These acts were instrumental in addressing post-Civil War violence and ensuring a fairer political process, particularly in the southern states where such intimidation was widespread. Despite some success in curbing the violence and restoring order, these acts were challenged over the years and parts of them were later declared unconstitutional. Nonetheless, they represented a significant effort by the federal government to achieve justice and security for newly freed African Americans.