http://www.greatwarspearhead.com/battle ... -gawaiten/
The action was part of the Battle of Gumbinnen, fought in August 1914. The battlefield is based on actual topographic maps of the area, reproduced using Hexon terrain under the terrain mat. You can see the effect in the photo entitled 'Rolling East Prussian countryside'. The terrain makes all the difference in a game like this, adding a level of complexity to the decision-making.
PS: the first supplement for the Eastern Front is 'Summer Harvest'. It features the Austro-Hungarian armies in August 1914 - perfect for the new range of figures.