After the Civil War, the 14th Amendment was passed to grant citizenship to former slaves and protect them from civil rights violations in their home states. Public schools were relatively rare throughout the United States, but were often segregated by race where they existed. The same Congress that passed the 14th Amendment created racially segregated schools for the District of Columbia. In the 20th century, the National Association for the Advancement of Colored People (NAACP) began a litigation campaign designed to bring an end to state mandated segregation, calling attention to the shabby accommodations provided for blacks, as well as arguing the damaging psychological effects that segregation had on black school children. One case was brought on behalf of Linda Brown, a third-grader from Topeka, Kan.