The offensive against Hanover was repeatedly delayed because of Prussia's partial reluctance for the Swedes and the Russians to move troops through Prussian territory.

On 6 August 1807, 50,000 French, Spanish and Dutch troops under Marshal Guillaume-Marie-Anne Brune began an assault on Swedish Pomerania and besieged Stralsund again.

However, Swedish General Johan Christopher Toll managed to conclude the Convention of Schlatkow with Marshal Brune on favourable terms, and his forces withdrew to Sweden, along with all of their war munitions, on 7 September.

Danish, French and Spanish troops began preparations for an invasion of Skåne in Sweden, but the plan was soon aborted, and the war was instead directed to the Norwegian-Swedish border.

Sir John Moore's expedition, sent by the British government to protect Sweden from possible French-Danish attack, arrived on 3 May 1808 and stayed until July, when it was redirected to Portugal.

Napoleon's plans to invade Sweden were never executed because of the British activity on the Baltic Sea, the weakness of the Danish military and the hesitations of French Marshal Bernadotte, whose actions made him popular enough to be elected as a Swedish Crown Prince after the coup d'etat in March 1809.

On 6 January 1810, Sweden signed a Russian-mediated Treaty of Paris with France, regaining Pomerania at a cost of joining the Continental System.