Fritz Wetterhoff (1878–1922) designed a flag for Finnish Jaegers. Based on his draft, a German drawing NCO achieved a finished drawing. Resembling the old Flag of Finland’s Guard, the Jaeger Flag is based on a blue St. George’s Cross on a white background. The coat of arms of the Grand Duchy of Finland is at the centre, and the corners are adorned with royal Prussian eagles. The Royal Prussian 27th Jaeger Battalion was composed of Finnish Jaegers. When it was disbanded on 13 February 1918, a religious service was held for their departure at the Holy Trinity Church of Libau (Liepãja). At the event, Finnish Jaegers took an oath of allegiance to the legitimate government of Finland and the flag was consecrated.

The Jaeger Flag was there at the reception parade of Jaegers in Vaasa on 26 February and at the Whites’ victory parade in Helsinki on 16 May 1918. It was donated to the War Archive in 1928 to celebrate the 10th anniversary of the Jaegers returning to Finland. From there, it was presented to the freshly founded Military Museum. The flag remains the pearl of the Military Museum’s collection. But it is fragile silk, so it can not be displayed to the public. Replicas have been made of the Jaeger Flag one of which is on display in the exhibition. At the Defence Forces’ parades, the flag is always at its honorary place right after the State Flag.