Joachim Koppen was a Phil. and Med. Doctor in Magdeburg who wrote this treatise after having been taught to fence at the University of Wittenberg by a certain Heinrich Beler(n) von Bautzen. It was first published in 1619, and then in 1625 and 1880. His treatise is also inspired by Italian fencing master Salvator Fabris.
Furthermore there are notes from 1630-35 about a Fähnrich and Capitain Joachim Köppen in Swedish service fighting against the Catholics. If this is the same person is at this stage still unclear.