Final answer:
The majority of American deaths in the Spanish-American-Cuban-Filipino War were caused by diseases such as yellow fever.
Step-by-step explanation:
The most American deaths in the Spanish-American-Cuban-Filipino War were caused by diseases such as yellow fever. The majority of fatalities on both sides were due to these diseases. Additionally, many African American troops were stationed overseas in the Philippines and died in larger numbers and percentages than other soldiers because whites assumed they were immune to the 'jungle' diseases. The army's medical service eventually developed ways to prevent the spread of yellow fever.