Division suppression
Division Suppression in Hearts of Iron IV
In simple terms: why cavalry with military police holds the rear better than infantry, and how not to burn factories on partisans.
📌 At a Glance
- Suppression is a stat for occupation and garrisons, not for combat damage.
- The higher a template’s suppression, the fewer divisions needed to keep resistance in check.
- About 0.75 suppression is needed per 1% of resistance; the calculation never drops below “as at 10%” and never scales above “as at 50%”.
- The best cheap source is cavalry (2 per battalion); military police add +20% to the whole division.
- Frontline infantry and tanks do have suppression, but chasing it on an offensive template is usually pointless.
🧠 What Division Suppression Is
Division suppression in HoI4 isn’t “another damage stat”. It’s a template’s ability to quell resistance in occupied territories through the garrison system.
In a battle for a tile, soft attack, breakthrough and organization decide the outcome. Suppression decides something else: how many men and rifles you burn in the rear while the army fights on the front.
📊 How the Game Calculates Suppression Needs
The need for suppression depends on the current resistance in a region. Roughly 0.75 suppression per 1% of resistance.
- There is a floor: even at low resistance the calculation is no softer than at 10% (≈ 7.5 suppression).
- There is a ceiling: above 50% resistance, the garrison need is calculated as if it were 50% (≈ 37.5 suppression).
Practical takeaway: a template with high suppression per unit of manpower and equipment covers the same rear with fewer divisions – less spending on garrisons, more manpower for the front.
📈 Where the Suppression Stat Comes From in the Designer
The number adds up from the battalions, then gets multiplied by bonuses like military police. The MP company itself gives almost no “raw” points – it multiplies the whole division’s suppression.
| Battalion | Suppression | Comment |
|---|---|---|
| Cavalry | 2 | The classic garrison choice |
| Armored Cars | 2.5 | Higher than cavalry, more expensive |
| Motorized Infantry | 2.2 | Good, but eats trucks |
| Bicycle Infantry | 2 | Same number as cavalry |
| Regular Infantry | 1.5 | Worse than cavalry for rear duty |
| Light/Medium Tanks | 2.5 | High number, insane price for a garrison |
| Marines | 1 | Not for occupation |
| Penal Battalions | 0.5 | Almost useless as a garrison |
A ready reference without doing the math in your head:
10 cavalry ≈ 20 suppression. With military police (+20%) ≈ 24.
The same skeleton of 10 infantry ≈ 15, with police ≈ 18 – noticeably worse for the same manpower.
🛡️ Military Police – The Key to Garrison and Suppression
Military police is an almost mandatory support slot for a garrison template. The regular version gives +20% division suppression; the motorized version gives +30%, plus an additional boost to motorized infantry suppression.
MP is usually not slotted into a frontline division: a support slot there is more valuable than +20% to a stat that’s useless on the line.
Police technologies add roughly another +10% per step – but that’s an amplifier for an already strong garrison, not a reason to put police in offensive tanks.
🐴 Why the Meta Favors Cavalry for Suppression, Not “Infantry with Police for Everything”
- Cavalry provides 2 suppression for 1000 men and only rifles – the best “suppression / manpower / factories” ratio for most nations.
- Armored cars give 2.5 but require separate equipment and production: there’s a gain, and it makes sense when rifles and men are more scarce than factories.
⚠️ A Garrison with Suppression ≠ a Field Army
Don’t confuse a garrison template with a field army on “Area Defense” orders. The occupation garrison template works through the occupation menu and automatically consumes equipment/manpower based on suppression need. A map division with high suppression also helps locally, but for a large empire it’s the cheap garrison templates that matter, not frontline 20‑widths.
⚖️ Pros and Cons of High Suppression
✅ Pros
- Fewer divisions and lower spending on garrisons.
- A more stable rear when occupation expands.
❌ Cons
- Almost useless in combat.
- Specialization for the rear makes the template weak on the front.
- Expensive “high‑suppression” options (armored cars, motorized) are easy to overspend on.
❓ Common Questions
No. It’s a stat for occupation and garrisons, not soft attack or breakthrough.
Cavalry + military police. An infantry garrison works, but usually costs more manpower for the same suppression.
Almost never. The support slot there is better used for engineers, recon, AA or support artillery.
🏁 One‑Liner Summary
Suppression is the economy of the rear: cavalry with police keep order cheaply, while infantry and tanks should fight on the front.