Clusters — Hearts of Iron IV

Everything About Air

Air is how you take Air Superiority and keep land troops standing in Hearts of Iron IV. How you build that air force decides whether you can shield the army from enemy bombing, punch through with Close Air Support, or dump Strategic Bombing chaos on the enemy. This cluster is the whole air war: designing planes that actually work in the Plane Designer, which aircraft types and missions fit which job, how you run air on the map, and how you take the green sky. Simple to sharp — air combat basics through the 2026 questions that still pay off. For new players and for people who want every last drop out of air in HoI.

Everything About Divisions

Divisions are the backbone of land warfare in Hearts of Iron IV. The template decides whether your army holds the front, punches through the line, or simply melts without supply and organization. This cluster is a complete guide to divisions: how to create and change templates, which unit types to pick for the job, how to assemble battalions, support companies and support regiments, which stats actually decide fights, and which templates are meta in 2026. Guides go from basics to meta. Useful for beginners and for players who want every bit of combat width, armor, and breakthrough.