The new tactics developed by Captain Rohr, building much on his own previous experiences from the front, was based on the use of squad sized stormtroops (""Sturmtruppen"" or ""Stoßtruppen""), supported by a number of heavy support weapons and field artillery that was to be coordinated at the lowest level possible and rolling up enemy trenches using troops armed with hand grenades. These tactics were tested the first time in October 1915 in a successful assault on a French position in the Vosges Mountains.