The core of the division comprised two army brigades from the German Eastern Front: 95.
They were supported by additional artillery and pioneer troops, and transported to Finland by a naval squadron led by Hugo Meurer.
The military activity of the division in Finland served part of the foreign policy of the German Empire after the Treaty of Brest-Litovsk with Soviet Russia, signed on 3 March 1918.
The Finnish Senate paid all the financial costs of the military intervention of the Baltic Sea Division and urged the Finnish people to provide food, shelter, and any other aid needed by the Baltic Sea Division.
During the Finnish Civil War, on 3 April 1918, it landed at Hanko and moved towards Helsinki and Lahti.