How did executive order 9981 also help start the civil rights movement

Executive Order 9981, one of Truman's most important achievements, became a major catalyst for the civil rights movement. When President Harry S. Truman signed Executive Order 9981 on July 26, 1948, calling for the desegregation of the U.S. Armed Forces, he repudiated 170 years of officially sanctioned discrimination.

after the roman empire, the catholic church began to unify by taking on many duties of a government.

i really do want to but i just don't know it i'm so sorry : (