Civil Rights Act of 1866
The Civil Rights Act of 1866, , enacted April 9, 1866, was the first United States federal law to define citizenship and affirm that all citizens are equally protected by the law. It was mainly intended, in the wake of the American Civil War, to protect the civil rights of persons of African descent born in or brought to the United States. This legislation was passed by Congress in 1865 and vetoed by U.S. President Andrew Johnson. In April 1866 Congress again passed the bill to support the Thirteenth Amendment. Johnson again vetoed it, but a two-thirds majority in each chamber overcame the veto to become law without presidential signature.
Civil rights movement
King reached the height of popular acclaim during his life in 1964, when he was awarded the Nobel Peace Prize. His career after that point was filled with frustrating challenges. The liberal coalition that had gained passage of the Civil Rights Act of 1964 and the Voting Rights Act of 1965 began to fray.