The Baltic Sea Division () was a 10,000 man German military unit commanded by Rüdiger von der Goltz. The core of the division comprised two army brigades from the German eastern front: 95. Reserve Infantry Brigade (led by Colonel K. Wolff) and 2. Guards Cavalry Brigade (led by Colonel H. von Tschirsky und von Bögendorff). They were supported by additional artillery and pioneer troops, and transported to Finland by a naval squadron led by Hugo Meurer.