@Queasy Happened routinely during WWII, including against white NCOs of African American regiments. Army never stepped in, quite the contrary.
Racial epithets and threats of violence were part of daily life on Southern military bases, and off base, African Americans were restricted to the "Black" sections of town.
"If they stepped even a foot outside of that, they were threatened or attacked by white police or sheriffs," Delmont says.
https://www.npr.org/2022/11/07/1134756262/half-american-matthew-delmont-black-wwii