The Treaty of Åbo ended the 1741–1743 Russo-Swedish War.

The Treaty of Åbo, or the Treaty of Turku, was a peace treaty signed between the Russian Empire and Sweden in Åbo (Turku) on 18 August [O.S. 7 August] 1743 in the end of the Russo-Swedish War of 1741–1743.

Altfinnland
Altfinnland (Source: Wikimedia Commons)
Théatre de la Guerre en Finlande - 1742
Théatre de la Guerre en Finlande - 1742 (Source: Wikimedia Commons)

Watch: Harsher than Versailles: The Treaty of Brest-Litovsk 1918 (Documentary)

From the The Great War channel.

Sources and further reading: Wikipedia — Treaty of Åbo, Russo-Swedish War (1741–1743) (CC BY-SA). Images: Wikimedia Commons.