Final answer:
In 1945, the U.S. Army, recognizing racial segregation and inequality, had the War Department's Advisory Committee on Negro Troop Policy recommend the military's gradual integration, but the establishment date of AR 350-90 for NCO Academies is not provided.
Step-by-step explanation:
The year 1945 was significant as it marked a momentous shift in attitudes within the U.S. military, specifically the Army's approach to integrating Non-Commissioned Officer (NCO) standards. Coming out of World War II, society began to rebuild and address significant issues of racial segregation and inequality. Within the U.S. Army, the toxic race relationship became clearer, leading to the War Department's Advisory Committee on Negro Troop Policy recommending the gradual integration of the military. However, it should be noted that AR 350-90, which established Army-wide standards for NCO Academies, is not specifically referenced in the question or the provided context. It appears that the question might have a gap or be asking about a separate, factual detail regarding NCO Academies that occurred in another year. Without more specific information, we are unable to say with certainty when AR 350-90 was established.