Thanks for the information. I had forgot this one completely!
This is especially interesting:
On 23 August 1942 a group of 51 men departed for Heeresgruppe Nord, returning on 11 October:
- kapteeni Tapani Suhonen
- vänrikki P. Holopainen
- 45 NCOs
- 3 lance-corporals (korpraali)
- 1 private (sotamies)
Like a some sort of demonstration unit but a rather early dates for winter training.
Maj. M. Murole commanded Frontier Jäger units during the war but the others seem to be more or less ordinary platoon, company, battalion or regiment commanders. Maj. J. Wallden participated in the battles against Soviet Partisans as the battalion commander of the 11th Brigade (Infantry Regiment 11). Were Sirola and Halttu from the Finnish Supreme HQ? And wasn't Maj. Yrjö Vasama a journalist? That would suggest his aim was to obtain information.
I think none of the NCOs (there is no familiar names to me) were from the Special Detachments of Finnish Supreme HQ but may well have been from other Sissi (/Jäger) or Frontier Jäger units.