The Battle of Revolax () took place on 27 April 1808 at Revonlahti, (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 1,800 men under Major General Michail Leontjevich Bulatov. The Russians were surrounded and tried to cut their way through but failed and the Russian general Bulatov was taken prisoner by the Swedes.