Which branch of the military was involved in the Spanish-American War starting in 1898?

The correct branch of the military involved in the Spanish-American War starting in 1898 encompasses the Navy, Army, and Marines, played significant roles. The Spanish-American War was largely fought by the United States Army and the Navy, with the Marines also participating in key engagements, such as the Battle of Guantanamo Bay and land operations in Cuba.

Understanding the involvement of these branches highlights the collaborative nature of military operations during this conflict. The Navy was crucial for blockades and naval battles, while the Army undertook ground operations. The Coast Guard, which operates under the Department of Homeland Security in peacetime, was not an active combat branch during the war. Its primary role has traditionally been focused on search and rescue, law enforcement, and maritime safety, which are significant but distinct from combat roles like those seen in the Spanish-American War.

Thus, while the Coast Guard has an essential role in national security and maritime operations, it did not participate in the Spanish-American War. The Army and Navy together with the Marines are more accurately attributed with the direct military actions during the war.