Silent Heroes:Elite troops of WW2 is an expansion to the original "Soldiers: Heroes of World War 2", it was developed by a different studio and is the only one of the 3 Soldiers Expansions to get released in English.

https://www.gog.com/wishlist/games/silent_heroes_elite_troops_of_wwii

It was originally sold Digitally on GamerGate but has been forgotten about, please vote so it will no longer be forgotten.