The United States Navy's SEa, Air and Land Teams, commonly known as the Navy SEALs, are the U.S. Navy's primary special operations force and a component of the Naval Special Warfare Command. Among the SEALs' main function is to conduct small-unit maritime military operations that originate from, and return to, a river, ocean, swamp, delta, or coastline. The SEALs are trained to operate in all environments (Sea, Air, and Land) for which they are named.