Marine

Marine is an umbrella term for things relating to the ocean, as with Marine biology, Marine geology, and as a term for a navy, etc. In scientific contexts, the term almost always refers exclusively to saltwater environments, although in other contexts (e.g., engineering) it may refer to any (usually navigable) body of water.

Historical Marine corps

• Corps of Colonial Marines - Formed by the British during the mid 1840s to serve in the remaining British America colonies (mainly the West Indies), The Colonial Marines were controlled by the Royal Marines as an auxiliary force. Initially recruited from freed or escaped slaves from the United States and later from local inhabitants, these units were either disbanded or absorbed by the West Indies Regiment.
• During the American Civil War, the Confederate Marine Corps.
• In Japan:
• Japanese Special Naval Landing Forces - existed from 1928 to 1945
• Also the Imperial Japanese Navy Land Forces - some with marine-like duties.