I'm a little disappointed in the HOI4 modding community, because this mod probably has a richer backstory and details than any other mod, unfortunately : r/hoi4
Soviet Union Guide - Defense in Depth : r/hoi4
Units Expanded - Skymods
Tried to change unit models, worked on infantry, cavalry, but din't work on Motorized and Mechanized, Help would be very aprecciated :) : r/hoi4
HOI4 Dev Diary - Combat and Stats changes | Paradox Interactive Forums
What is a good HOI4 Germany template (if you're doing infantry, only no tanks but you can have things like anti-tank and arty, and allow air power and navy)? - Quora
Hearts of Iron 4 division templates: how to manage your forces | Wargamer
Hearts of Iron 4 meta – combat width, division templates, and more | PCGamesN
Help with Modding new Units and equipment : r/hoi4
HoI4 Dev Diary - Fuel Review and Motorized Artillery | Paradox Interactive Forums
Artillery technology - Hearts of Iron 4 Wiki
HOI4 Dev Diary - Combat and Stats changes | Paradox Interactive Forums
Support companies technology - Hearts of Iron 4 Wiki
Infantry technology - Hearts of Iron 4 Wiki
Steam Workshop::Units Expanded(Discontinued)
Hearts of Iron IV - Dev Diary: Combat & Stat Changes - Steam News