Dierk Hagedorn was born in 1966 in Hamburg, Germany, and he started sport fencing at the age of nine. He is head instructor of the longsword for Hammaborg Historischer Schwertkampf. He is also a member of HEMAC, the Historical European Martial Arts Coalition, and has transcribed more than a dozen German manuscripts. He is an illustrator, web-designer and lecturer.
Bartłomiej Walczak was born in 1978 and has been practising and researching historical martial arts since 1999. He has lectured worldwide, published transcripts, translations and articles and has participated in tournaments, winning the 2015 ILHG Open Longsword. He lives in Poland and works remotely as a software designer for a US-based start-up.