The Russo–Swedish War of 1741–1743, known as…

The Russo–Swedish War of 1741–1743, known as the Hats' Russian War in Sweden and the Hats' War in Finland, which results in the Lesser Wrath, or the occupation of Finland, is instigated by the Hats, a Swedish political party that aspires to regain the territories lost to Russia during the Great Northern War, and by French diplomacy, which seeks to divert Russia's attention from supporting its long-standing ally, the Habsburg monarchy, in the War of the Austrian Succession.

While eight thousand Swedish and Finnish troops are being deployed at the Russian border, near Lappeenranta (Swedish: Villmanstrand) and Hamina (Swedish: Frederikshamn), Sweden declares war on August 8.

The objective of these maneuvers is to threaten Saint Petersburg and to set the stage for a coup d'état, engineered by French and Swedish diplomats and aimed at toppling the pro-Austrian regime of Anna Leopoldovna.