In Hearts of Iron IV, the traditional mantra is that infantry holds the line while tanks win the war. However, for many nations—particularly minor powers with limited Industrial Capacity (IC)—heavy armor divisions are often an unattainable luxury. The challenge then becomes how to transform standard foot soldiers into a force capable of shattering enemy lines. Building an effective offensive infantry template requires a delicate balance of Soft Attack, Breakthrough, and Combat Width management.

The Core Philosophy of Infantry Offense

The primary reason most players fail when attacking with infantry is a lack of Breakthrough. In HOI4 combat mechanics, Breakthrough acts as the "defense" stat for the attacker. If your division's Breakthrough is lower than the enemy's total attack, your troops take significantly more damage, leading to rapid Organization loss and massive manpower casualties.

Standard infantry battalions provide excellent Defense and Organization but almost zero Breakthrough. To make infantry offensive, you must supplement them with Artillery (for Soft Attack) and specialized support companies or armored battalions (for Breakthrough and Armor).

The Quick Answer: The 30-Width 9/3 Meta

For those looking for the most reliable all-around offensive infantry template in the current meta, the 9 Infantry / 3 Artillery (30 Combat Width) setup is the gold standard.

  • Composition: 9 Infantry Battalions, 3 Artillery Battalions.
  • Support Companies: Engineers, Support Artillery, Support Anti-Air, Medium Flame Tank, and Rangers (if available) or Motorized Recon.
  • Why it works: At 30 width, this division fits efficiently into Forest and Plain tiles, which make up the majority of critical combat zones. The three line artillery battalions provide enough Soft Attack to "crit" enemy infantry, while the support companies mitigate the inherent weaknesses of the leg infantry.

Understanding Key Stats for Offensive Success

Soft Attack vs. Hard Attack

Since the AI rarely builds massive amounts of high-hardness tank divisions, Soft Attack is your most important stat. It determines how much damage you deal to enemy infantry. Every point of Soft Attack that exceeds the enemy’s Defense has a 4x higher chance of dealing damage to their Organization and Strength.

The Breakthrough Problem

As mentioned, infantry are naturally poor at Breakthrough. A pure 10-infantry division might have 20 Breakthrough, while a single enemy division might have 100 Soft Attack. This means your infantry is effectively "unprotected" during 80% of the combat rounds. To fix this without tanks, you must rely on:

  1. Artillery: Adds massive Soft Attack to end combat faster.
  2. Flame Tanks: Provide a percentage-based Breakthrough buff.
  3. Grand Battle Plan Doctrine: Offers massive planning bonuses that multiply your Breakthrough.

Organization and HP

An offensive division needs enough Organization to stay in the fight and enough HP (Hit Points) to ensure equipment isn't destroyed too quickly. Adding too much artillery lowers your Organization. Aim for a minimum of 30 Organization for offensive templates; anything lower will see your divisions retreat before they can achieve a breakthrough.

Top Offensive Infantry Templates for Every Scenario

1. The 27-Width "Economic Pusher" (9 Inf, 1 Art, 1 AT/AA)

If you are playing a country like China or a Balkan minor, you might not have the tungsten or IC to support 30-width 9/3 divisions. The 27-width template is a highly efficient alternative.

  • Structure: 9 Infantry, 1 Artillery, 1 Anti-Tank (or a second Artillery).
  • Combat Width: 27 is a "magic number" that performs exceptionally well in Mountain and Forest terrain due to the way combat width penalties are calculated in the latest patches.
  • Best For: Low-supply zones and mountainous regions. It provides a decent punch while remaining affordable.

2. The "Space Marine" Variation (9 Inf, 2 Art, 1 Medium Tank)

This is the most powerful "infantry" division in the game. By adding a single medium tank battalion with high armor, you give the entire division an "Armor" stat. If the enemy cannot pierce this armor, you receive the "Unpierced" golden shield, which reduces incoming damage by 50% and increases your Organization damage by 50%.

  • The Tank Design: Focus on maximum Armor and a Howitzer gun for Soft Attack. Keep the speed at 4.0 km/h to match the infantry.
  • Pros: Incredible survivability and breakthrough.
  • Cons: Requires a dedicated tank production line and more supply.

3. The 35-Width "Juggernaut" (11 Inf, 3 Art, 1 Anti-Air)

In late-game scenarios where supply hubs are fully upgraded, larger divisions often perform better because they concentrate more Soft Attack into a single combat interaction.

  • Combat Width: 35 width fits perfectly into Plains (70 width total allows two of these to fight without penalty).
  • Performance: Massive Soft Attack. When paired with the "Superior Firepower" doctrine (Right-Left path), these divisions can delete enemy garrisons in days.

The Critical Role of Support Companies

An offensive infantry division is only as good as its support staff. In the modern HOI4 meta, support companies are no longer optional extras; they are the primary source of your multipliers.

Medium Flame Tank (Mandatory)

The Flame Tank support company is arguably the single best addition for offensive infantry.

  • Bonuses: It provides massive percentage buffs to attack in difficult terrain (Forest, Jungle, Forts, Urban).
  • Stat Boost: It offers a flat increase to Breakthrough that infantry desperately needs.
  • Strategy: Design the cheapest possible medium tank with a flame thrower, maxed-out armor, and minimum speed.

Rangers (Arms Against Tyranny DLC)

If you have the AAT DLC, Rangers replace the standard Cavalry Recon.

  • Why they are better: They provide significant buffs to Artillery soft attack and improve movement speed in rough terrain. For an offensive 9/3 template, Rangers are a massive force multiplier.

Support Anti-Air (The Budget Breakthrough)

Support AA is essential for two reasons:

  1. Piercing: It gives your infantry enough piercing to deal with light tanks and basic medium tanks.
  2. Air Mitigation: It reduces the damage taken from enemy Close Air Support (CAS). If you don't have air superiority, you must have Support AA, or your offensive will fail before it starts.

Engineers

Offensive infantry will eventually need to cross rivers or attack entrenched positions. Engineers provide the necessary "Attack across river" and "Fort Attack" bonuses that prevent your offensive from grinding to a halt at the first geographical obstacle.

Matching Doctrines to Your Templates

Choosing the right Military Doctrine is what turns a good template into an unstoppable one.

Superior Firepower (Integrated Support)

This is the go-to doctrine for offensive infantry.

  • Focus: It gives massive Soft Attack bonuses to your support companies and line artillery.
  • Impact: Your 9/3 divisions will reach Soft Attack values that rival mid-tier tank divisions. Use the Right-Left path (Integrated Support and Shock & Awe) for maximum infantry lethality.

Grand Battle Plan (Infiltration)

Many players overlook Grand Battle Plan for offense, but it is actually superior for minor nations.

  • The Power of Planning: The Max Planning bonus can reach +50% or more. This bonus applies directly to your Soft Attack and Breakthrough.
  • Strategy: You draw an offensive line, let the planning bar fill up, and then execute. For a few weeks, your infantry will have the stats of modern tanks.

Mass Assault (Deep Battle)

Only recommended for nations like the USSR or China. It focuses on reducing combat width, allowing you to cram even more infantry into a single battle. While not as "punchy" as Superior Firepower, it allows for a relentless, grinding offensive that wears the enemy down through sheer numbers and reinforcement rate.

Industrial Requirements and Scaling

Before deploying offensive infantry, you must calculate your production capacity.

  • Artillery Costs: A 9/3 division requires 108 Artillery pieces. If you plan to field 24 of these divisions, you need to produce nearly 2,600 pieces of artillery.
  • Tungsten Dependency: Unlike pure infantry, offensive templates are hungry for Tungsten. If you don't have domestic access or trade routes to Portugal, Sweden, or the USSR, you may need to stick to a 9/1 (21 width) template to conserve resources.
  • Supply Consumption: Line artillery significantly increases supply usage. Always upgrade your railways to Level 2 or 3 and use Motorized Supply Hubs (blue truck icon) before launching a major offensive. An out-of-supply 9/3 division is weaker than a well-supplied 10/0 division.

How to Execute an Infantry Offensive

Even the best template will fail if used incorrectly. Follow these rules for tactical execution:

  1. Concentration of Force (Schwerpunkt): Never spread your offensive infantry across the entire front. Use standard 18-width (9/0) infantry to hold the line, and concentrate your 9/3 divisions on 2-3 specific tiles.
  2. Terrain Awareness: Avoid attacking into Mountains or across large Rivers with infantry unless they are specialized Mountaineers. Aim for Plains or Forests where your combat width efficiency is highest.
  3. The CAS Factor: Infantry offensives live or die by Close Air Support. CAS deals direct damage to enemy Strength and Organization, bypassing Defense stats. If you have 500+ CAS planes over the combat zone, even basic infantry will seem like elite shock troops.
  4. Pinning Attacks: Use your defensive divisions to attack adjacent tiles. This "pins" the enemy reinforcements in place, preventing them from reinforcing the tile your 9/3 divisions are trying to break.

Specialized Offensive Infantry: Mountaineers and Marines

When standard infantry isn't enough, look to Special Forces.

  • Mountaineers: In the current version of HOI4, Mountaineers have their own specialized tree. You can build them into 30-width monsters with increased Breakthrough and specific buffs for hill fighting. They are strictly better than infantry if you have the Special Forces capacity.
  • Marines: Essential for naval invasions, obviously, but their "Amphibious" stat also applies to crossing rivers. A 9/3 Marine template is the best tool for breaking a stalemated river line (like the Dnieper or the Rhine).

Summary of Recommendations

Building the best offensive infantry template is an exercise in resource management and understanding combat width. For most players, the 30-width 9/3 offers the best balance of firepower and stability. By adding Flame Tanks and focusing on Superior Firepower doctrine, you can overcome the inherent breakthrough limitations of leg infantry.

Remember: Infantry offense is expensive. It costs manpower and equipment at a much higher rate than tank warfare. Always ensure your logistics and air cover are prepared before clicking that offensive arrow.

FAQ

Why not use 7/2 templates anymore?

In older versions of HOI4, the 20-width 7/2 was the meta. After the combat width changes in No Step Back, 20-width is no longer optimal for most terrains. Furthermore, Artillery was nerfed, making the 7/2 too fragile (low HP/Organization) for the amount of Soft Attack it provides. The 9/3 or 9/1 are now more efficient.

Should I use Line Anti-Tank (AT)?

Against the AI, Support AT is usually enough to pierce their divisions. Only use Line AT (adding it to the template blocks) if you are facing a player who is using heavy tank divisions that your Support AA cannot handle.

Is the 42-width infantry template still viable?

42-width divisions have massive stats, but they suffer from terrible "Overwidth" penalties in most terrains now. They are also very susceptible to CAS damage. Stick to 30 or 35 width for a better balance of stats and flexibility.

What is the best support company for a minor nation?

Engineers are the most important for the defense and movement buffs, followed closely by Support Artillery for the cheap Soft Attack. If you can only afford two, choose these.

How do I get enough Breakthrough for my infantry?

Increase your planning bonus by using a General with the "organizer" trait and the Grand Battle Plan doctrine. Additionally, always include a Medium Flame Tank support company; it's a game-changer for infantry breakthrough.