Treaty of Drottningholm, between Sweden and Russia, is signed.

The Treaty of Drottningholm was an agreement between Sweden and Russia that helped restore peaceful relations between the two countries following the Russo-Swedish War of 1788–1790. The conflict had been initiated by King Gustav III of Sweden, who hoped to regain territories lost to Russia during earlier wars and strengthen Sweden’s position in the Baltic region. Although the war ended with the Treaty of Värälä in August 1790, tensions remained between the two powers. The Treaty of Drottningholm, negotiated between Gustav III and Empress Catherine II of Russia, established a defensive alliance and marked a significant improvement in their diplomatic relationship. Under the agreement, the two monarchies pledged mutual support, with Russia also providing financial assistance to Sweden. The alliance reflected their shared concern about the revolutionary developments unfolding in France and the potential spread of revolutionary ideas throughout Europe. For Gustav III, the treaty offered financial and diplomatic support for his ambitions to oppose the French Revolution, while Catherine II saw it as an opportunity to secure Russia’s northern frontier and strengthen cooperation with Sweden. However, Gustav III’s assassination in March 1792 disrupted these plans, limiting the alliance’s practical impact.