Hearts of Iron IV Builds: Best Templates & Strategies for Any Nation
Key Takeaways
- 40-width divisions remain the dominant meta for ground combat, but 27-width can work for specialized roles
- 10-0 infantry with engineers and support AA is the most cost-effective defensive template for most nations
- Focus on medium tanks with high reliability (80%+) and soft attack for breakthroughs
- Never neglect air superiority: fighters with max agility and heavy fighters for range can win the war
The Foundation: Division Templates That Actually Work
I’ve spent over 1,200 hours in HoI4, and if there’s one thing I’ve learned, it’s that your division templates make or break your campaign. The base game’s default templates are garbage—20-width infantry with no support companies will get shredded by 1941. Here’s what you should actually build.
Infantry: The Defensive Backbone
Your standard infantry should be 10 battalions of infantry plus support engineers, support anti-air (AA), and support artillery. That’s 20 width, 120 org, and enough AA to contest green air. For 1940s technology, this holds against AI tank pushes if you have entrenchment.
Pro tip: Add a single artillery battalion to push soft attack to 120+ for offensive operations. This 7-2 template (7 infantry, 2 artillery) still works for minor nations with limited industry.
Tank Divisions: Breaking the Line
For majors like Germany or USSR, your tank template should be 12 medium tanks, 4 motorized infantry, and support engineers, maintenance, and logistics. That’s 40 width, 35-40 org, and 200+ soft attack. With 1943 medium tanks (improved medium chassis, high-velocity gun, sloped armor), you’ll shred infantry and even enemy tanks.
The reliability trap: Always keep reliability above 80%. I once ran 60% reliability tanks thinking speed mattered more—lost 300 tanks to attrition in two weeks in the Russian mud. Not worth it.
Production Lines: What to Build and When
Your civilian factories should be 25-30% of total by 1938. Focus on building synthetic refineries if you lack oil (Germany, Japan). For military factories, the priority order is:
- Fighters (always first—air superiority is non-negotiable)
- Medium tanks (your main offensive arm)
- Support equipment and artillery
- Naval bombers or CAS (if you have air superiority)
Concrete numbers: As Germany, aim for 10 military factories on fighters by 1939, 8 on medium tanks, 4 on artillery, and 2 on support equipment. This gives you 2,000 fighters and 500 tanks by the Polish campaign.
Air Force: The Hidden Kingmaker
I can’t stress this enough: air superiority wins wars. Even with 1940 tanks, if the enemy has green air, your divisions will be bombed to half strength before the battle starts. Build fighters with max agility and a single engine; reliability doesn’t matter as much for air (they get shot down, not worn out).
For ground attack, don’t use tactical bombers—use close air support (CAS). A single CAS wing of 200 planes can add 30+ air support to a battle, effectively doubling your division’s attack.
Comparison Table: Division Templates by Role
| Role | Width | Battalions | Support Companies | Soft Attack | Org |
| ------ | ------- | ------------ | ------------------- | ------------- | ----- |
| Defensive Infantry | 20 | 10 inf | Eng, AA | 50 | 120 |
| Offensive Infantry | 27 | 9 inf, 3 art | Eng, AA, Art | 120 | 90 |
| Breakthrough Tank | 40 | 12 med, 4 mot | Eng, Maint, Log | 200+ | 35 |
| Special Forces | 20 | 6 marines, 4 art | Eng, AA, Recon | 140 | 85 |
The 40-width tank template is king for 1941-1943, but don’t use it in mountains or marshes—use 20-width marines instead.
Hidden Secrets Most Players Miss
- Army spirit: Choose “Integrated Support” for +5% soft attack on all divisions. It’s better than “Grand Battleplan” for offensive wars.
- Naval invasion support: If you invade from multiple ports simultaneously (e.g., D-Day), each invasion gets a -50% planning bonus penalty. Use a single port if possible.
- Railway guns: They’re mostly useless. The 40-width artillery is a meme. Stick to standard templates.
Common Mistakes and How to Fix Them
1. Too many 40-width divisions: You can’t supply them. Build 20-width infantry for holding lines and 40-width tanks for breakthroughs.
2. Ignoring fuel: Tanks without fuel move 50% slower. Build synthetic refineries or conquer oil fields early.
3. Not training: Your divisions need 100% HP before combat. Train them in low-threat areas like Africa or Spain.
FAQ
Q: Should I use 20-width or 40-width infantry for the Soviet Union?
A: 20-width is better for the sheer number of divisions you need to hold the line. 40-width infantry is too expensive and you’ll run out of manpower by 1942. Stick with 20-width until you have surplus equipment.
Q: What’s the best tank design for 1940?
A: Improved medium chassis with a high-velocity cannon, sloped armor (level 3), and a gasoline engine. Aim for 80% reliability and 8 km/h speed. The extra armor is worth more than a few extra attack points.
Q: How do I beat the Allies as Germany in 1939?
A: Rush medium tanks (1939 tech), build 10 factories on fighters, and do the “Around Maginot” focus. Don’t attack Belgium directly—go through the Netherlands first to get a wider front. Use 4 tank divisions to encircle the French army in the Ardennes.