Acta Periodica Duellatorum (APD) is an independent, international, and peer-reviewed journal dedicated to Historical European Martial Arts studies. This emerging field of research has strong interdisciplinary dimensions with notably History, Anthropology, Historical sciences, Art History, History of Science and Technology, Archaeology, Sport Sciences, etc. APD was founded in 2013 and publishes two issues per year from 2016 on. The Scholarly volume offers an academic level platform for fundamental research, position papers and methodological papers, with a double blind peer review process. The Hands On volume offers a platform for pragmatic research, intended for the communities of practitioners, bridging the gap between experienced martial artists, independent researchers and scholars. APD is a non for profit association, based in Switzerland. It is supported by institutional grants, donators/partners and by its readers. The journal is published electronically (open-access) and printed for subscribed readers and institutions. Volume 4, Issue 1 (Scholarly Volume) - table of content: EDITORIAL ARTICLES Investigation on the collation of the first Fight book (Leeds, Royal Armouries, Ms I.33) (Fanny Binard) A Well Regulated Militia Political and Military Organisation in Pre-Napoleonic Switzerland (Dr. J rg Gassmann) The French staff material from Johann Georg Pasch (Olivier Dupuis) The use of the saber in the army of Napoleon (Bert Gevaert) Income and working time of a Fencing Master in Bologna in the 15th and early 16th (Alessandro Battistini, Niki Corradetti) Pole-weapons in the Sagas of Icelanders: a comparison of literary and archaeological sources (Jan H. Orkisz) RESEARCH NOTE Two late flying prints informing on the artist involved in the Opera Nova of Achille Marozzo and on the date of an original (lost) edition? (Roberto Gotti, Daniel Jaquet) BOOK REVIEWS Jeffrey L. Forgeng, The Art of Swordsmanship by Hans Leck chner (Daniel Jaquet) Jaser, Christian and Israe