What are the duties of the Marines?
The Marines conduct special military operations that require landing on foreign soil from bodies of water.
Marine operations include land-air power.
What are the duties of the Air Force?
The Air Force uses planes and other types of aircraft in military operations.
What are the duties of the Coast Guard?
The Coast Guard protects the coast of the United States, enforces maritime laws, conducts search and rescue operations, and much more.