Marines - Military service branch specialized in amphibious warfare

"Marines, also known as naval infantry, are typically an infantry force that specializes in the support of naval and army operations at sea and on land and air, as well as the execution of their own operations. In many countries, the marines are an integral part of that state's navy. In others, it is a separate organization altogether, such as in the United States, where the Marine Corps falls under the US Department of the Navy, yet it operates independently. Marines can also fall under a country's army like the Troupes de marine. - Wikipedia"