Yes, all the core concepts (combat, movement, weapon statistics for different eras of combat etc) are all in Johan Lambshead’s book. I will say that they are very simple and can almost be explained in its entirety on 2 pages (in fact everything you need to know is demonstrated in the video), but to respect the author I didn’t want to just verbatim include them in this as it’s intended to be a supplement not a complete rulebook. Once again thanks for checking it out!