School segregation in the North was also a major issue. In Illinois, Ohio, Pennsylvania, and New Jersey, towns in the south of those states enforced school segregation, despite state laws outlawing the practice of it. Indiana also required school segregation by state law. During the 1940s, however, NAACP lawsuits quickly depleted segregation from the Illinois, Ohio, Pennsylvania and New Jersey southern areas. In 1949, Indiana officially repealed its school segregation law as well. The most common form of segregation in the northern states came from anti-miscegenation laws.