Hello,
the german term for this troopers is "Landungspionier" (single) / "Landungspioniere" (group). Strengh about 15000 soldiers, part of the army (Heer).
They do a raid against Leros, 1943, set 1200 soldiers & equipment at the beach, the island fall after 5 days fighting. The german navy try 3 times a landing, get some fire too, then quit their landing. Only the pionier boats run through the fire.
Yours, Sebastian