Sweden declares war on its ally the United Kingdom to begin the Anglo-Swedish War, although no fighting ever takes place.
The Anglo-Swedish War (1810–1812) was a largely symbolic conflict between the United Kingdom and Sweden during the Napoleonic Wars, notable for its lack of major military engagements. Sweden, under pressure from Napoleon Bonaparte after its defeat in the Finnish War and subsequent alignment with France via the Treaty of Paris (1810), was forced to declare war on Britain as part of its obligations under the Continental System, Napoleon’s economic blockade aimed at isolating Britain. However, Sweden had little interest in genuinely opposing Britain, its traditional ally and trading partner. The war saw no actual battles or confrontations between the two nations, and Sweden covertly maintained economic ties with Britain. The conflict ended with the Treaty of Örebro in 1812, which formally restored peace and allowed Sweden to shift alliances and join the coalition against Napoleon. This war exemplifies the complex alliances and pressures smaller European states faced during the Napoleonic era.