Henry Ossian Flipper - Wikipedia

"On June 15, 1877 Henry Ossian Flipper becomes 1st African American to graduate from West Point Military Academy.". From the article:
"After his commissioning he was assigned to one of the all-black regiments in the US Army, which were historically led by white officers. Assigned to 'A' Troop under the command of Captain Nicholas M. Nolan, he became the first nonwhite officer to lead buffalo soldiers of the 10th Cavalry. Flipper served with competency and distinction during the Apache Wars and the Victorio Campaign, but was haunted by rumors alleging improprieties. Eventually, he was court-martialed and dismissed from the US Army.

After losing his commission in the Army, Flipper worked throughout Mexico and Latin America as an assistant to the Secretary of the Interior. He retired to Atlanta in 1931 and died of natural causes in 1940.

In 1994, his descendants applied to the US military for a review of Flipper's court martial and dismissal. A review found the conviction and punishment were "unduly harsh and unjust" and recommended Flipper's dismissal to be changed to a good conduct discharge. Shortly afterwards, an application for pardon was filed with the Secretary of the Army, which was forwarded to the Department of Justice. President Bill Clinton pardoned Lieutenant Henry O. Flipper on February 19, 1999."