Complex sentence: When the United States entered World War II, Ulysses joined the army but found himself in a segregated military, in which all Black soldiers were put to work in menial units: burying bodies, supply delivery, or kitchen work.
Split into simpler sentences: When the United States entered World War II, Ulysses joined the army but found himself relegated to digging graves. All Black soldiers were put to work in menial units: burying bodies, supply delivery, or kitchen work.