No Steps Back and the Barbarossa update introduced a new way to specialize your military with the Officer Corps. This powerful tool allows you to manage your high command, generals, and doctrines in one location. The main benefit of the officer corps, however, is the introduction of spirits.
Spirits are potent boosts that you can apply to each branch of your military in exchange for Army Experience. Keep in mind when selecting a spirit that you can only have one of each type active at once.
Here you will manage your Chief of Army, land doctrine, and your army spirits. Army section gives you a unique option over the other military branches — the ability to select a preferred tactic. Selecting a preferred tactic increases the chance it will appear in combat by 25%. Army spirits are divided into three sections, each providing boosts to different aspects of the army.
Army Experience Gain: +25% Army Advisor Cost: -50%
Weekly Manpower: +500 Encirclement penalty: -20%
State serves the Military
Political Power: +10% Conscription Laws Cost: -25%
Tip of the Spear
Naval Invasion Capacity: +10 Extra Paratrooper and Marine Supply Grace: +24 Hours Naval Invasion Planning: +20% Marine, Mountaineer, and Paratroop Unit Design Cost: -100%
Doctrine:Grand Battle Plan
Artillery experience gain from combat: +10% Support, Line, and Motorized Artillery Unit Design Cost: -100% Infantry Unit Design Cost: -100% All Self-Propelled Artillery, besides modern, Unit Design Cost: -100%
Infantry experience gain from combat: +10% Infantry Unit Design Cost: −100% Motorized and Mechanized Infantry Unit Design Cost: -100%
Motorized and Mechanized experience gain from combat: +10% All Tank Unit Design Cost: -100% Motorized and Mechanized Infantry Unit Design Cost: -100%
Spirits of Division Command offer boosts to your battle stats and increase the chance of using specific tactics. Each spirit costs 50 Army Experience to activate.
Entrenchment speed: +10% Max Entrenchment: +10% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
Divisions speed: +5% Organization Loss when Moving: -15% Preferred Tactics Selection cost: −15
Reconnaissance: +15% Intel from combat: +15% Chance of Infiltration Assault Tactic: +100%
Division training time: -15% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
Victory or Death
Organization loss when below 25%: -15% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
Supply Consumption: -5% Navy/Air Fuel Consumption: -5% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
Smoke and Fire
Breakthrough: +5% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
HP: +10% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
Divisions Speed: +5% Coordination: +5% Chance of Elastic Defense or Overwhelming Fire Tactic: +100%
This section lets you manage your Chief of Navy, naval doctrine, and three naval spirits. Similar to the army spirits, the naval spirits are divided into three sections, designed to enhance different aspects of your navy.
Retreat Decision Chance: -5% Critical Hit Chance: +15%
Bureau of Ordnance
Torpedo Hit Chance: -10%
Naval Hit Chance: +10% Retreat Decision Chance: -10% Fleet Speed while Retreating: -10% Torpedo hit Chance: +10%
Doctrine:Fleet in Being
Retreat Decision Chance: +10% Fleet Speed while Retreating: +10% Screening Bonus with only capital ships: +20%
Retreat chance after initial combat: +10% Retreat speed after initial combat: +10%
Air Force Command
Last but not least, we have the Air Force section of the officer corps. As you might expect, here you can manage your Chief of Air Force, air doctrine, and your air force spirits. Unlike the other sections, however, you only get two spirits to choose from here.
This category of spirits is focused on researching and designing new aircraft. They cost 50 Air Experience to enable.
Independent Air Force
Air Advisor Cost: -75%
Light, Medium, Heavy, and Naval Aircraft Research Speed: +15%
Effective Training Programs
Air Wing Training Experience: +25%
Branch Independence Spirit
Air Experience Daily Gain: +0.1 Airforce Intelligence to others: -5%
Air Crew Surveys
Air Accidents Chance: -25% Air Doctrine Cost:-15%
Heavy Aircraft Research Speed: +5% Strategic Bomber and Jet Strategic Bomber Design Cost: -75%
Close Air Support Research Speed: +5% Close Air Support Design Cost: -75% Carrier Close Air Support Design Cost: -75%
Tactical Bomber Research Speed: +5% Tactical Bomber and Jet Tactical Bomber Design Cost: -75%
These spirits provide general bonuses to your air force. Each one of these also costs 50 Air Experience to activate.
Battlefield Air Interdiction
Escort Efficiency: +5% Ground Attack: +5%
Veteran Air Instructors
Air Wing Experience loss when defeated: -25%
Fighter Detection: +10% Air Mission Efficiency: +10%
Air home defense: +10%
Air Power Projection
Air power projection: +10%
CAG Night Fighting
Carrier night penalty reduction: +33%
Steel Wings, Steel Hearts
Untrained Pilot Penalty: -33%
Strategic Bombing: +10%
Air Support Mission Efficiency: +25%
Air Superiority: +5%
The officer corps provides a great quality-of-life feature for managing the direction of your military in a single location, and spirits are a powerful tool to add to your arsenal while preparing for war. Optimizing spirits to fit your goals and military composition can give you an important edge in Hearts of Iron IV.
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Strategy game enthusiast, especially Paradox titles and the Civilization series. Whenever he's not writing he spends his time watching sports, enjoying coffee, or studying history.