All times in UTC ·
Dashed edge = started before, or continues beyond, this day
Events on Sunday 21 February 1808 1
1808Finnish War BeginsRussia invades Swedish FinlandRussian forces crossed into Finland without a declaration of war, opening a conflict that would end with Sweden ceding Finland to Russia in 1809. The war was fought in coordination with Napoleon's pressure on Sweden to join the Continental System.