Bonus when assaulting with engineers ?

[vionville]

Generally to say engineers are second class infantry, what makes them also second class assualt troops. The exception is: Flame thrower unit (the same as Russian MP infantry in East Front II), sturmpionier, or some demolition vehicles (Goliath or Sdkfz 301), the last is especially useful when assualting fortified hex. (bunker or pillbox).