When Russia and France made peace in 1807 Sweden was left in the anti-French alliance with Britain. Czar Alexander used this as a pretext to invade Finland. Internal difficulties made Swedish military action largely ineffective. A new Swedish king, Charles XIII, made peace with the Czar and signed the Treaty of Fredrikshamm. Finland and the Aland Islands were ceded to Russia.

• Sveaborg 06 April 1808
• Sandöström 02 August 1808
• Orawais 15 September 1808
• Palva Sound 18 September 1808