Kammala jumla mai zuwa: A matsayin dalibi na makarantar sakandare na Oulu Lyceum, Aaro Pakaslahti ya halarci a matsayin memba na Tsaro na kasa a yakin Oulu a watan Fabrairun 1918 a cikin Yakin basasa na Finnish kuma daga baya a cikin Yaƙe-yaƙe na Tribal a
Binciken Aunus a cikin bazara na 1919, inda aka ji masa rauni.