This is a timeline of battles and other events of the Finnish War (1808–1809). The dates are according to the Gregorian (Western European) calendar. Russian sources might refer to Julian calendar dates.
| Date |
Event |
Location |
Coordinates |
| February 21, 1808 (c. 5:00 a.m) |
Russian army crosses the border to Finland |
Kymi river, border river, near Hamina. |
? |
| March/April, 1808 |
Russian army |
Kuopio, Tampere, Jakobstad |
? |
| March/April, 1808 |
Russian navy |
Gotland, Åland |
? |
| March 18, 1808 |
The Russian army conquers the Fortress of Svartholm |
Loviisa |
? |
| March 21, 1808 |
The Russian army conquers the Hanko Peninsula |
|
? |
| March 22, 1808 |
The Russian army conquers Turku |
|
? |
| April 6, 1808 |
Cronstedt, who is the commander of the Fortress of Suomenlinna, negotiates with the Russian army |
|
? |
| April 16, 1808 |
Battle of Pyhäjoki |
Pyhäjoki |
? |
| April 18, 1808 |
Battle of Siikajoki |
|
? |
| April 27, 1808 |
Battle of Revolax |
|
? |
| May 2, 1808 |
Battle of Pulkkila |
|
? |
| May 3, 1808 |
Siege of Sveaborg |
Suomenlinna at Helsinki |
? |
| May 9, 1808 |
Battle of Kumlinge |
|
? |
| June 19–20, 1808 |
Battle of Lemo |
|
? |
| June, 1808 |
Alexander I calls for elections and invites Finnish representatives to gather in Saint Petersburg. The deputies are led by Carl Erik Mannerheim. |
|
? |
| June 24, 1808 |
Battle of Nykarleby |
Nykarleby |
? |
| June 25, 1808 |
Battle of Vaasa |
Vaasa |
? |
| June 30, 1808 |
Battle of Rimito Kramp |
|
? |
| July 11, 1808 |
Battle of Kokonsaari |
|
? |
| July 14, 1808 |
Battle of Lapua |
|
? |
| August 2–3, 1808 |
Battle of Sandöström |
|
? |
| August 10, 1808 |
Battle of Kauhajoki |
|
? |
| August 17, 1808 |
Battle of Alavus |
|
? |
| August 21, 1808 |
Battle of Karstula |
Karstula |
? |
| August 28, 1808 |
Battle of Lappfjärd |
|
? |
| August 30, 1808 |
Battle of Grönvikssund |
|
? |
| September 1, 1808 |
Battle of Ruona |
|
? |
|
Battle of Ruona and Salmi |
|
? |
| September 2, 1808 |
Battle of Salmi (same as above?) |
|
? |
| September 6, 1808 |
Battle of Ömossa |
Ömossa |
? |
| September 13, 1808 |
Battle of Jutas |
Nykarleby |
? |
| September 14, 1808 |
Battle of Oravais |
Oravais |
? |
| September 18, 1808 |
Battle of Palva Sund |
|
? |
| September 29, 1808 |
Truce of Lohteå |
|
? |
| October 27, 1808 |
Battle of Koljonvirta |
|
? |
| November 10, 1808 |
The Moonlight Raid |
|
? |
| November 19, 1808 |
Convention of Olkijoki: the Finnish army retreats north of the Kemi River |
|
? |
| March 21, 1809 |
Convention of Åland |
|
? |
| March 25, 1809 |
Convention of Seivis/Kalix, after Russian navy raids in Gulf of Bothnia |
|
? |
| March 25-July 19, 1809 |
Diet of Porvoo |
|
? |
| May 15, 1809 |
Encounter at Skellefteå |
|
? |
| July 5–6, 1809 |
Battle of Hörnefors |
|
? |
| August 19, 1809 |
Battle of Sävar |
|
? |
| August 20, 1809 |
Battle of Ratan |
|
? |
| August 25, 1809 |
Battle of Piteå |
Piteå |
? |
| September 2, 1809 |
Truce of Frostkåge gästgivargård |
|
? |
| September 17, 1809 |
Treaty of Fredrikshamn |
|
? |
