The Bronx, New York - Heavyweight champion Joe Louis beat Max Schmeling, in Yankee Stadium. It was an historic fight because Schmeling was German, when the Nazi Party and Hitler were at their height.
The Nazis promoted racial dominance of whites over Black Americans, in mind and body. With the defeat, it showed the belief to be a lie. These race beliefs of the Nazis led to World War 2, the next year.
Washington, D. C. - President Franklin Roosevelt signed the Fair Labor Standards Act (FLSA) of 1938, into law. The FLSA blocked farm workers. It did not cover domestic workers. At the time, about 65% of Black Americans were farm and domestic workers. The FLSA left them without any legal safeguards.
The FLSA was another piece to Roosevelt's New Deal. With Congress, he helped whites and excluded Black Americans. Not until 1966 were some farm workers given help under the FLSA. This was well after many Black Americans had left the farms for the factories. Domestic workers were added, in 1974.