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| 1908 | |  | | Thurgood Marshall is born is Baltimore, MD. |
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| 1909 | |  | | The Nation Association for the Advancement of Colored People is founded in New York, NY. |
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| 1912 | |  | | April 4 - Baltimore Branch founded and is the second branch chartered in the US. |
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| 1926 | |  | | Baltimore City equalized pay for black and white teachers. |
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| 1931 | |  | | Lillie Carol Jackson, and her daughter Juanita—who was then 18 years of age—organize a street-level campaign under the slogan "Buy Where You Can Work," persuading black Baltimoreans to boycott businesses with racist employment policies |
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| 1934 | |  | | Thurgood Marshall begins to work for the Baltimore Branch. |
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| 1935 | |  | | In a case argued by Thurgood Marshall, a Baltimore City court orders the integration of the University of Maryland Law School. Donald Gaines Murray registered for classes in September 1935. NAACP Baltimore Branch revived under leadership of Lillie Carroll Jackson. |
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| 1938 | |  | | Lillie Carroll Jackson leads the legal battle for the equalization of pay for white and black teachers in public schools in all counties in Maryland |
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| 1939 | |  | | Morgan College became part of the Maryland University System. |
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| 1945 | |  | | Kerr v. Enoch Pratt Free Library argued by Charles H. Houston creating the " Kerr Principle". A Baltimore library refused to admit Louise Kerr to a training program because she was black. Not that it had anything against blacks, but its patrons did. When Kerr launched a civil suit against the library alleging a violation of equal protection of the laws, the courts credited the library’s claim that it had no racist purpose, but Kerr still prevailed. The Kerr principle forced us to address when and why is the state responsible for enabling exclusive preferences, whether by an overextended applicable rule that assist them or by state inaction that fails to block them. |
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| 1950 | |  | | Juanita Jackson Mitchell becomes the first Black woman to practice law in the State of Maryland. Law suit opened University of Maryland School of Nursing to blacks. |
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| 1951 | |  | | University of Maryland graduate school integrated. |
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| 1953 | |  | | Lillie Carroll Jackson wins legal victory to the end of whites-only admissions at the University of Maryland School of Law Maryland State parks open to blacks. |
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| 1954 | |  | | Public housing in Baltimore integrated. First black elected to House of Delegates, from Baltimore. Baltimore becomes the first Southern city to integrate its schools after the landmark Brown v. Board decision. |
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| 1955 | |  | | Maryland National Guard units integrated. NAACP member, Rosa Parks, is arrested in Montgomery, Alabama for refusing to give up her seat on a segregated bus. |
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| 1957 | |  | | The Civil Rights Act is passed by the United States Congress. |
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| 1958 | |  | | Irma Dixon and Verda Welcome Freeman become the first African American women to be elected to the Maryland House of Delegates. |
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| 1962 | |  | | Verda Freeman Welcome becomes the first African-American woman to be elected to the state Senate. |
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| 1963 | |  | | An estimated 250,000 people join in the March on Washington. Rev. Martin Luther King, Jr. delivers his famous "I Have a Dream" speech on the steps of the Lincoln Memorial. Medgar Evers, field secretary for the NAACP, is killed outside his home in Jackson, MS. |
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| 1964 | |  | | US Congress passes the Civil Rights Act of 1964. |
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| 1967 | |  | | Thurgood Marshall becomes the first African American United States Supreme Court Justice. |
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| 1968 | |  | | Rev. Martin Luther King, Jr. is assassinated in Memphis, TN |
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| 1970 | |  | | Milton B. Allen is the first African-American elected states attorney for the city of Baltimore. |
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| 1971 | |  | | Parren J. Mitchell is the first African American elected to US Congress from Maryland. Roland Nathaniel Patterson is the first African-American appointed superintendent of schools in Baltimore. |
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