From the release:
This month they increase the fire-power available to the British Armoured Divisions with the addition of the Sherman Firefly and the M4/A4 Sherman V 75mm. To protect your armoured assests they have added a beautiful model of a Sherman Crab Flail to clear away those pesky mines.
The Germans receive reinforcements in the guise of the StuGIIIF8 and the StuGIV.