Wikipedia
The Meredessantpataljon, was a short lived Estonian marine infantry battalion during the Estonian War of Independence of the Estonian Defence Forces subject to the Estonian Navy. The battalion was created from the crews of the Estonian surface warships, students and Finnish volunteers soldiers. The battalion was created and later disbanded in Tallinn after it had fulfilled its military objectives in 1919.
As common marine infantry tasks include providing security in a warship whilst at sea and reflecting the pressed nature of the ships company and the risk of mutiny. Also other tasks include boarding of vessels during combat or capture of prize ships and providing manpower for raiding ashore in support of the naval objectives, the Estonian Meredessantpataljon was more focused on contributing to the campaign ashores, in supporting of the military objectives.
Another difference from the usual marines is that the Estonian marines unit was only a temporary military formation. The unit was operational from March to June in 1919. Today there are no marine infantry or marine special force units among the Estonian Defence Forces.