It was the desegregation of the armed forces, issued by President Harry S. Truman in February 1948.
EO9981 refers to Executive Order 9981, which was signed by President Harry S. Truman on July 26, 1948. This executive order called for the desegregation of the United States Armed Forces and paved the way for racial integration within the military. It prohibited discrimination based on race, color, religion, or national origin within the military, marking a significant step towards civil rights reform.