Complete guide to Hearts of Iron IV mechanics in French: 29 categories (land combat, divisions, production, diplomacy, espionage, navy, air force and more) · 82 community-written articles by La Meute QC. Integrated keyword search. Each article explains one game mechanic and its numbers, without assuming you already speak grand-strategy jargon.
A good HOI4 division respects the optimal combat width (20w or 40w), balances organization and firepower, and includes appropriate support companies (engineers, artillery, logistics). The 9/1 infantry/artillery template is a solid defensive standard.
Production uses military factories (MICs) assigned to production lines. Each line builds up efficiency over time. Changing equipment or adding/removing factories reduces efficiency. Industrial technologies and economic laws increase production capacity.
The 4 land doctrines are: Mobile Warfare (armour and breakthrough bonus), Superior Firepower (artillery and soft attack), Mass Assault (defence and manpower), and Grand Battleplan (organization and planning). Each doctrine has two exclusive branches.
The 6 strategic resources are: Oil (vehicles and ships), Steel (armour and ships), Aluminium (aircraft), Tungsten (artillery and armour-piercing), Chromium (heavy armour) and Rubber (aircraft and vehicles). They are obtained through local production or trade.
The espionage system requires the La Résistance DLC. Create an intelligence agency, recruit agents, and launch operations such as decryption, network infiltration, sabotage or coups. Agents gain experience and can be captured.
