Sweden The Battle of Revolax (Finnish: Revonlahden taistelu) took place on 27 April 1808 at Revonlahti,[4] (now part of Siikajoki) in Northern Ostrobothnia, Finland, when the Swedish supreme commander Wilhelm Mauritz Klingspor and the Savolax brigade under Colonel Johan Adam Cronstedt, a total of about 2,250 Swedes surprised an isolated Russian column of about 1,700 men under Major General Michail Leontievich Bulatov.

This, and the preceding battle of Siikajoki nine days earlier, are considered very important events since they are the first Swedish victories after about 2 months of planned retreat.

The Swedes could hear the sound of musket fire to the north, where Adlercreutz were fighting against the forward Russian unit which had been advancing on him.

Klingspor, who was known to be a cautious and sceptical man, acted against his temperament, and ordered a counter-offensive towards the south.

Sandel's newly formed 5th Brigade would soon take commence resistance fighting in the eastern parts of Finland.