[1] Pohjan pojat fought under the command of Estonian Lieutenant Colonel Hans Kalm on the southern front in Estonia.

He published direct and emotional recruitment announcements in newspapers on December 23, 1918, in which he appealed to his comrades-in-arms during the Finnish Civil War.

[1] He formed a brigade that consisted of two infantry battalions and three artillery batteries supported by communication, cavalry and skiing departments.

Their first battle was near Paju Manor (German: Luhde-Grosshof) against a heavily armed Red Army Latvian sniper battalion on 31 January.

In the evening, after a long and persistent firing, the Finns invaded the west side of the town and captured it with a bayonet attack.

The Finns fought a consuming and severe station war in the area until the end of the month, when they returned to Valki on March 29.