The Baltic Sea is more than an inland sea – it is a historic geopolitical stage. From maritime travel in the Viking era toa NATO-dominated region, this brackish inland sea has been a lifeline for people and countries in northern Europe. The Baltic Sea has served as a hub for economic and political relations – with the dominance of the Hanseatic League in the Middle Ages, the Great Power Battles between Sweden, Poland-Lithuania and Russia, and the dramatic shifts in the aftermath of the Nap...