Which individual was the first black woman officer to retire after her full 20 years of service?

BGen Margaret Brewer was the first female officer in the Marine Corps to achieve the rank of brigadier general, and her service was significant for women in the military. Pvt Opha Mae Johnson was the first woman to enlist in the United States Marine Corps but did not serve full 20 years as an officer. Maj Gregory Boyington, known for his flying aces during World War II, does not relate to this question, as he was a male officer and not fitting the criteria of being a black woman.

CWO Annie Grimes stands out as the first black woman officer to retire after her full 20 years of service, breaking barriers and paving the way for future generations of women in the Marine Corps. Her accomplishment reflects dedication and commitment to service, making her a pivotal figure in military history. This significant milestone highlights the progress achieved in promoting diversity and inclusion within the armed forces.