Which branch of the U.S. military is primarily responsible for naval warfare?

The Navy is the branch of the U.S. military that specializes in naval warfare, which includes operations conducted at sea and the protection of maritime interests. Its primary responsibilities involve the deployment of naval forces, conducting naval operations, and managing maritime strategy. The Navy operates ships, submarines, and naval aircraft, all vital for securing and maintaining dominance in maritime environments.

While other branches of the military, such as the Army, Air Force, and Marines, play crucial roles in national defense and can support naval operations, their primary focus differs. The Army is land-focused, the Air Force specializes in aerial warfare, and the Marines function as an amphibious force, operating in both land and naval environments but under the auspices of the Navy. Hence, the Navy is unequivocally the answer when identifying the branch dedicated to naval warfare.