Final answer:
Black seamen in the U.S. Navy endured ill treatment during World War II, including fatalities due to safety negligence, and discrimination and lynching upon returning from the war.
Step-by-step explanation:
Two examples of ill treatment African American sailors endured in the U.S. Navy are:
- During World War II, black seamen were killed in San Francisco due to the failure of a white officer to follow safety regulations.
- After returning from the war, black veterans faced severe discrimination and at least a dozen were lynched by whites who felt their military service threatened white supremacy.