Heats Of Iron 4 📢
Factories gain efficiency the longer they produce the same equipment. Retooling to a new tank model causes a temporary "efficiency cap" drop.
Build Civilian Factories (CIVs) first to increase your future building speed, then transition to Military Factories (MILs) as world tension rises. heats of iron 4
The early game (1936–1938) is a race for industrial capacity and political alignment. Factories gain efficiency the longer they produce the
Higher trade openness grants research and construction speed but "exports" your resources, potentially leaving you short on steel or oil for your own tanks. ⚙️ Pillar II: Industrial Output & Research heats of iron 4