That's the problem.  It's pulling from many inspirational sources from early wargaming as well as reconciling early RPG systems such as OD&D, Holmes, Moldvay/Cook, and AD&D 1e and 2e.  Too many to list out.  Bath and Featherstone and Barker will all be part of the DNA.  I still need to dig into Diplomacy variants too.  A lot of D&D founders were part of that movement and culture.

Too many to name.  Here are a few influences:  Bath (scouting game, NPC personalities, family and aging), Featherstone (matchbox method, higher level siege warfare), and Arneson's FFC (the investments and structure of the Blackmoor army campaign),  AD&D 1st edition for the assassin and spying stuff, Barker (weather & siegecraft).