Help wanted. Again!

[hoplite14gr]

The time: April 1941
The place: Strymon riverGreece
The unit: Brandenburg regiment (Wehrmacht commandos & infiltration unit)

Unconfirmed info say they tried to infiltrate the Greek fortifications with rubber boats through the river wearing Greek Army uniforms.
But someone..mistook them for....Bulgarians!!!!! and they were shot to pieces.

Any info on the unit and online resources would be very much appreciated
Thanks in advnce fellow memebers

Kind regards