The “tenaille” system and the “polygonal” system which grew out of it are mainly identified with the German school.
Two were placed in the tenaille of the castle, and two were kept in reserve.
The two batteries G, F were intended to silence the fire of the north-west salient and of the left half of the tenaille.
Here the main bastions and tenaille are detached from the enceinte.
For a dry and level site he recommended a bastioned trace; but for wet ditches and for irregular ground, tenaille traces.
On the twenty-third the tenaille was stormed, and a lodgement made along the covered way.
De Groote, who wrote in 1618, produced a sort of tenaille system, and may have been the inspiration of Rimpler.
The tenaille trace: Flanks back to back between the faces (fig. 16).
tenaille bastion: Used when the flanked angle is too acute; that is, less than 70.
These works show various applications of the tenaille system.