As the Civil War broke out in January 1918, Salmela's skills were noticed by Red leaders Ali Aaltonen and Eero Haapalainen. In late February, he was transferred to Tampere, where Salmela replaced Mikhail Svechnikov as the Commander-in-Chief of the Northern Front. Since Salmela did not have any military training, the Russian lieutenant colonel Georgi Bulatsel became his advisor. During the Battle of Tampere, Salmela led the defence mainly by himself, with instructions from Bulatsel, as Aaltonen was focusing on drinking.