Final answer:
The 9th and 10th Cavalry fought in Cuba during the Spanish-American War.
Step-by-step explanation:
The 9th and 10th Cavalry, also known as the Buffalo Soldiers, fought in Cuba during the Spanish-American War. These regiments of African American troops were key elements in the successful campaigns against Spanish forces on the island, demonstrating exceptional combat capabilities during significant battles, such as the one involving Theodore Roosevelt's Rough Riders at San Juan Hill.
The Spanish-American War took place in 1898 and resulted not only in Cuban independence but also in the United States acquiring territories like Puerto Rico, Guam, and the Philippines as a result of Spain's defeat.