A map of Scandinavia by Johannes Hoffman shows the Swedish borders after the Treaty of Åbo (also known as the Treaty of Turku; 1743). The Russo-Swedish War (also known as the War of the Hats) ended with the Treaty of Åbo as a result of which Sweden lost some of its territories to Russia, including the Lappeenranta Fortress. The Kymijoki River was now the nation’s border.
