 At the age of 32, Marshall won U.S. Supreme Court case "Chambers v. Florida", 309 U.S. 227 (1940).That same year, he founded and became the executive director of the NAACP Legal Defense and Educational Fund.As the head of the Legal Defense Fund, he argued many other civil rights cases before the Supreme Court, most of them successfully, including "Smith v. Allwright", 321 U.S. 649 (1944); "Shelley v. Kraemer", 334 U.S. 1 (1948); "Sweatt v. Painter", 339 U.S. 629 (1950); and "McLaurin v. Oklahoma State Regents", 339 U.S. 637 (1950).