Hearts of Iron IV - Development Diary 4 - Land Doctrines

Hearts of Iron IV - Development Diary 4 - Land Doctrines

  • Crusader Kings III Available Now!

    The realm rejoices as Paradox Interactive announces the launch of Crusader Kings III, the latest entry in the publisher’s grand strategy role-playing game franchise. Advisors may now jockey for positions of influence and adversaries should save their schemes for another day, because on this day Crusader Kings III can be purchased on Steam, the Paradox Store, and other major online retailers.


    Real Strategy Requires Cunning

Darkrenown

Star marshal
28 Badges
Jan 8, 2002
24.642
16.661
no
  • Sengoku
  • Crusader Kings II: Reapers Due
  • Stellaris Sign-up
  • Paradox Order
  • Victoria 2 Beta
  • Victoria 2 A House Divided Beta
  • Europa Universalis: Rome Collectors Edition
  • Hearts of Iron II: Beta
  • Cities: Skylines
  • 500k Club
  • 200k Club
  • Rome: Vae Victis
  • Victoria 2
  • Ship Simulator Extremes
  • Hearts of Iron II: Armageddon
  • Semper Fi
  • Europa Universalis: Rome
  • Europa Universalis III Complete
  • Lost Empire - Immortals
  • Europa Universalis III Complete
  • Heir to the Throne
  • Hearts of Iron III Collection
  • Hearts of Iron III
  • For The Glory
  • Europa Universalis III: Chronicles
  • Europa Universalis III
  • East India Company
  • Deus Vult
Hello! It's time for another Hearts of Iron 4 Developer Diary, and this one is about Land Doctrines. For HoI4, we are leaning more towards the Doctrine paths you may remember from HoI2 than the mix-and-match of HoI3. We have 4 main mutually exclusive Doctrine paths which nations can research. Each path also has one or more mutually exclusive choices to further differentiate the doctrines and sub-doctrines. Because we are still pre-alpha, I can't really describe exactly what each tech in the tree does at the moment; this can and will change as we implement, test and iterate over them. I can describe the general idea behind each path and choice so hopefully you will understand what we are aiming for.

Diary 4 - doctrin tree.jpg


Mobile Warfare: This path focuses on mobile mechanized units and is the default German path. Armour and motorized/mechanized units will have the largest gains in this path. It also reduces the planning time needed before you can launch an attack. This path is somewhat frontloaded with early bonuses. The first branching in this tree allows you to choose between Mobile Infantry or Armour as your main focus. While Mobile Infantry isn't as effective in combat, it is cheaper and can be used in greater numbers, so it could be an alternate strategy for Germany, or be used by a less industrially powerful nation. The second split offers the choice between switching over to a defensive posture (maximizing Manpower gains) as Germany historically did, or continuing to develop offensive mobile doctrines. And yes, we know Blitzkrieg wasn't a formal doctrine, but the mishmash of innovations and new techniques that the Germans used is popularly known as such, so we roll with it.

Superior Firepower: This is the American default path. This doctrine focuses on big, well-equipped, but expensive divisions and gains a bonus when fighting in areas with friendly air superiority. The first split offers the choice between adding more support units to each division, or focusing on independently deployed support brigades. The second split will let you pick between Airland battle (for increased cooperation with the air force for combat support) or Shock and Awe (which keeps the majority of your focus on ground-based firepower).

Grand Battleplan: This could be thought of as the traditional doctrine path, and is the default choice for Britain, France, Italy, and Japan. This doctrine path gives you larger planning bonuses and boosts Infantry and Artillery. It is a bit weak on the offence to begin with, but has some defensive bonuses. The split offers the choice between increased offensive potential and steadily improving all unit types with the Assault path, or focusing heavily on Infantry with the more frontloaded Infiltration path.

Mass Assault: The default doctrine for the USSR and China. It focuses on using large amounts of Manpower and offers increased morale and reinforce-speed. The early techs give some defensive bonuses and Infantry/Militia boosts. The first path decision here offers either continuing with the same methods with Mass Mobilisation (the mass use of Infantry and Militia) or adopting the innovative Soviet Deep Battle doctrine, which makes use of the modern tools of war and boosts the capability of Armour, artillery, and mobile units. You may notice from the image that the Mass Mobilisation path is shorter than the others. This is because it's more of a series of stopgap measures for nations in dire straits than a real doctrine, and we want to encourage nations to swap out of it when/if their situation improves.

"Swap out of it?" I hear you say. Yes, you can change your Doctrine path if you want. This will come at a cost. There will be a period of disorganisation for your army based on how far into your previous path you were and on the size of your army, so it's likely not something you want to do when things are going very poorly in the middle of a war. However, you do not necessarily start from scratch in your new Doctrine path: Several techs are shared between the paths, and if you switch to a path which includes a shared tech you have already researched you will start at that point in the new tree.

Ok, that's about all for this DD, start trying to guess the tech names based on their icons! :)
 
Last edited by a moderator:
  • 16
  • 5
  • 3
Reactions:

podcat

Oberkommando HOI4
Super Moderator
12 Badges
Jul 23, 2007
12.610
30.925
  • Hearts of Iron III
  • Semper Fi
  • 500k Club
  • Europa Universalis III: Collection
  • Europa Universalis IV: Pre-order
  • Hearts of Iron II: Beta
  • Europa Universalis: Rome Collectors Edition
  • Mount & Blade: Warband
  • Paradox Order
  • Hearts of Iron IV Sign-up
  • Hearts of Iron IV: Together for Victory
Very shamefur
 
  • 1
Reactions:

Kung Zog

Lt. General
27 Badges
Dec 19, 2010
1.360
143
  • Cities in Motion
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Semper Fi
  • Rome Gold
  • King Arthur II
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Art of War
  • Crusader Kings II
  • Darkest Hour
  • Europa Universalis III: Chronicles
  • Europa Universalis IV: Wealth of Nations
  • Victoria 2
  • Warlock: Master of the Arcane
  • War of the Roses
  • 500k Club
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: Cossacks
  • Crusader Kings II: Conclave
  • Stellaris
  • Crusader Kings II: Sword of Islam
  • Magicka
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
Seems nice and streamlined. I'm glad the vanilla HOI3 doctrine tree isn't in. Too much all over the place.
 
  • 1
Reactions:

FOARP

Field Marshal
49 Badges
Sep 10, 2008
6.076
3.642
  • Arsenal of Democracy
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Sword of the Stars II
  • Sword of the Stars
  • Semper Fi
  • Victoria: Revolutions
  • Europa Universalis IV: Res Publica
  • Naval War: Arctic Circle
  • Magicka
  • Heir to the Throne
  • Hearts of Iron III
  • Gettysburg
  • For the Motherland
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Conquest of Paradise
  • Divine Wind
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sword of Islam
  • Darkest Hour
  • Europa Universalis III
  • Europa Universalis III Complete
  • Europa Universalis IV: Art of War
  • Steel Division: Normandy 44 -  Back to Hell
  • Hearts of Iron IV: Expansion Pass
  • Hearts of Iron IV: Expansion Pass
  • Steel Division: Normand 44 - Second Wave
  • Hearts of Iron IV: Death or Dishonor
  • Steel Division: Normandy 44
  • Hearts of Iron IV: Field Marshal
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Cadet
  • Hearts of Iron IV Sign-up
  • Crusader Kings II: Way of Life
  • Mount & Blade: With Fire and Sword
  • Mount & Blade: Warband
  • 500k Club
  • Warlock: Master of the Arcane
  • Victoria 2
  • Europa Universalis III Complete
  • Europa Universalis III Complete
I really hope this isn't a no-brainer where everyone simply lumps for the Blitzkrieg path, because LOL, Blitzkrieg. Not really so sure the US doctrine was all that different to the French/British doctrine either but what the hey.
 

unmerged(358653)

Major
4 Badges
Aug 4, 2011
603
3
  • Darkest Hour
  • March of the Eagles
  • Pillars of Eternity
  • Humble Paradox Bundle
The last 'German' doctrine is Werewolf? Funny :D
 
  • 1
Reactions:

nikssims

Lt. General
10 Badges
Dec 4, 2010
1.491
88
  • Crusader Kings II
  • Darkest Hour
  • Europa Universalis III
  • Europa Universalis III: Chronicles
  • Europa Universalis III Complete
  • Divine Wind
  • Heir to the Throne
  • Europa Universalis III Complete
  • Europa Universalis III Complete
  • 500k Club
well looks intresting, though gameplay video and usage of it in game would be more appriciated.
 

Mendeth

Colonel
76 Badges
Aug 6, 2007
843
310
  • Semper Fi
  • Hearts of Iron III Collection
  • Heir to the Throne
  • Europa Universalis III Complete
  • Europa Universalis III Complete
  • Naval War: Arctic Circle
  • Europa Universalis IV: Res Publica
  • Victoria: Revolutions
  • Hearts of Iron II: Armageddon
  • Rome Gold
  • Victoria 2: A House Divided
  • Victoria 2: Heart of Darkness
  • Europa Universalis IV: Third Rome
  • Europa Universalis IV: Pre-order
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Cossacks
  • Stellaris: Leviathans Story Pack
  • Stellaris - Path to Destruction bundle
  • Hearts of Iron III
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sword of Islam
  • Europa Universalis III
  • Hearts of Iron III: Their Finest Hour
  • For the Motherland
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Divine Wind
  • Crusader Kings II: Conclave
  • Victoria 2
  • Crusader Kings II: Monks and Mystics
  • Hearts of Iron IV: Together for Victory
  • Surviving Mars: First Colony Edition
  • Crusader Kings II: Reapers Due
  • Hearts of Iron IV: Cadet
  • Stellaris
  • Crusader Kings II: Holy Knight (pre-order)
  • Warlock 2: The Exiled
  • 500k Club
  • Crusader Kings II: Horse Lords
  • Europa Universalis IV: Common Sense
  • Pillars of Eternity
  • Crusader Kings II: Way of Life
Wheelchair RPG troops! Guessing it's the conscription of young and elderly to fight?
 

unmerged(358653)

Major
4 Badges
Aug 4, 2011
603
3
  • Darkest Hour
  • March of the Eagles
  • Pillars of Eternity
  • Humble Paradox Bundle
Wheelchair RPG troops! Guessing it's the conscription of young and elderly to fight?
Yes, Volkssturm thingie. I think they should change the icon, the current one is hilarious.
 
  • 2
Reactions:

SFSLovenought

Horse Fascist
63 Badges
May 5, 2013
1.444
2.009
  • Sword of the Stars
  • Stellaris: Synthetic Dawn
  • Stellaris - Path to Destruction bundle
  • Stellaris: Leviathans Story Pack
  • Europa Universalis IV: Common Sense
  • Europa Universalis IV: Pre-order
  • Sword of the Stars II
  • Crusader Kings II
  • Semper Fi
  • Europa Universalis IV: Res Publica
  • Magicka
  • Knights of Pen and Paper +1 Edition
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Wealth of Nations
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sword of Islam
  • Europa Universalis IV: Call to arms event
  • Europa Universalis III Complete
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Europa Universalis III
  • Europa Universalis IV: Cossacks
  • Europa Universalis IV: Mandate of Heaven
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Digital Anniversary Edition
  • Age of Wonders: Planetfall
  • Europa Universalis IV: Rights of Man
  • Hearts of Iron IV: Cadet
  • Stellaris Sign-up
  • Hearts of Iron IV Sign-up
  • Stellaris
  • Europa Universalis IV: Mare Nostrum
  • Crusader Kings II: Horse Lords
  • Europa Universalis III Complete
  • Humble Paradox Bundle
  • Pillars of Eternity
  • Crusader Kings II: Way of Life
  • Pride of Nations
  • Europa Universalis IV: El Dorado
  • War of the Roses
  • Victoria 2
I don't really understand Infiltration.
What does that even mean, and how do you segue from huge, pre-planned set piece WW1 battles to sneaky sneaky unorthodox infiltration? (If that's what the doctrine is about.)
 
Last edited:

Darkrenown

Star marshal
28 Badges
Jan 8, 2002
24.642
16.661
no
  • Sengoku
  • Crusader Kings II: Reapers Due
  • Stellaris Sign-up
  • Paradox Order
  • Victoria 2 Beta
  • Victoria 2 A House Divided Beta
  • Europa Universalis: Rome Collectors Edition
  • Hearts of Iron II: Beta
  • Cities: Skylines
  • 500k Club
  • 200k Club
  • Rome: Vae Victis
  • Victoria 2
  • Ship Simulator Extremes
  • Hearts of Iron II: Armageddon
  • Semper Fi
  • Europa Universalis: Rome
  • Europa Universalis III Complete
  • Lost Empire - Immortals
  • Europa Universalis III Complete
  • Heir to the Throne
  • Hearts of Iron III Collection
  • Hearts of Iron III
  • For The Glory
  • Europa Universalis III: Chronicles
  • Europa Universalis III
  • East India Company
  • Deus Vult
I don't really understand Infiltration.
What does that even mean, and how do you segue from Huge, pre-planned set piece WW1 battles to sneaky sneaky unorthodox infiltration? (If that's what the doctrine is about.)
You sneak your men into position, possibly even into the enemy's defensive lines, before you start your huge attack. Keeps the element of surprise and allows key parts of the enemy's line to be isolated and overwhelmed.
 
  • 1
Reactions:

unmerged(358653)

Major
4 Badges
Aug 4, 2011
603
3
  • Darkest Hour
  • March of the Eagles
  • Pillars of Eternity
  • Humble Paradox Bundle
Mass mobilization branch is so short :( I believe you will add some techs there to make it as long as other ones? :)
 

Kung Zog

Lt. General
27 Badges
Dec 19, 2010
1.360
143
  • Cities in Motion
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Semper Fi
  • Rome Gold
  • King Arthur II
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Art of War
  • Crusader Kings II
  • Darkest Hour
  • Europa Universalis III: Chronicles
  • Europa Universalis IV: Wealth of Nations
  • Victoria 2
  • Warlock: Master of the Arcane
  • War of the Roses
  • 500k Club
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: Cossacks
  • Crusader Kings II: Conclave
  • Stellaris
  • Crusader Kings II: Sword of Islam
  • Magicka
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
I don't really understand Infiltration.
What does that even mean, and how do you segue from Huge, pre-planned set piece WW1 battles to sneaky sneaky unorthodox infiltration? (If that's what the doctrine is about.)
It simulates the Japanese strategy during WW2. They came, like most countries, from the Grand Plan Doctrine but also implemented infiltration. However infiltration was mostly a "tactical doctrine" rather than a "Strategic" or "Operational doctrine" and it is quite possible that the game binds those two together.
 

Kung Zog

Lt. General
27 Badges
Dec 19, 2010
1.360
143
  • Cities in Motion
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Semper Fi
  • Rome Gold
  • King Arthur II
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Art of War
  • Crusader Kings II
  • Darkest Hour
  • Europa Universalis III: Chronicles
  • Europa Universalis IV: Wealth of Nations
  • Victoria 2
  • Warlock: Master of the Arcane
  • War of the Roses
  • 500k Club
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: Cossacks
  • Crusader Kings II: Conclave
  • Stellaris
  • Crusader Kings II: Sword of Islam
  • Magicka
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
Mass mobilization branch is so short :( I believe you will add some techs there to make it as long as other ones? :)

see this

Mass Assault: The default doctrine for the USSR and China. It focuses on using large amounts of Manpower and offers increased morale and reinforce-speed. The early techs give some defensive bonuses and Infantry/Militia boosts. The first path decision here offers either continuing with the same methods with Mass Mobilisation (the mass use of Infantry and Militia) or adopting the innovative Soviet Deep Battle doctrine, which makes use of the modern tools of war and boosts the capability of Armour, artillery, and mobile units. You may notice from the image that the Mass Mobilisation path is shorter than the others. This is because it's more of a series of stopgap measures for nations in dire straits than a real doctrine, and we want to encourage nations to swap out of it when/if their situation improves.
 
  • 1
Reactions:

repent

sinner
81 Badges
Jun 1, 2008
539
174
  • Stellaris: Galaxy Edition
  • Stellaris: Galaxy Edition
  • Stellaris
  • Europa Universalis IV: Mare Nostrum
  • Cities: Skylines - Snowfall
  • Europa Universalis IV: Cossacks
  • Crusader Kings III
  • Crusader Kings II: Way of Life
  • Pillars of Eternity
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Horse Lords
  • Cities: Skylines - After Dark
  • Crusader Kings II: Conclave
  • Achtung Panzer
  • Hearts of Iron IV Sign-up
  • Hearts of Iron IV: Cadet
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Field Marshal
  • Europa Universalis IV: Rights of Man
  • Tyranny: Archon Edition
  • Stellaris: Digital Anniversary Edition
  • Stellaris: Leviathans Story Pack
  • Steel Division: Normandy 44
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Ancient Relics
  • Europa Universalis IV: Cradle of Civilization
  • Stellaris: Humanoids Species Pack
  • Europa Universalis IV: Dharma
  • Stellaris: Apocalypse
  • Europa Universalis IV: Rule Britannia
  • Steel Division: Normandy 44 -  Back to Hell
  • Crusader Kings II: Holy Fury Pre-order
  • Stellaris: Distant Stars
  • Europa Universalis III: Collection
  • Prison Architect
  • Imperator: Rome Sign Up
  • Hearts of Iron IV: Death or Dishonor
  • Europa Universalis IV: Mandate of Heaven
  • Steel Division: Normandy 44 Deluxe Edition
  • Rome: Vae Victis
  • 500k Club
  • Crusader Kings II: Holy Knight (pre-order)
  • Europa Universalis IV: Third Rome
  • Crusader Kings II: Reapers Due
  • Hearts of Iron IV: Expansion Pass
  • Steel Division: Normand 44 - Second Wave
  • Tyranny - Tales from the Tiers
  • Stellaris: Synthetic Dawn
  • Stellaris - Path to Destruction bundle
Ok, that's about all for this DD, start trying to guess the tech names based on their icons! :)
Very Well.

hawk men.PNG

Must be winged Hawkmen tech called:

fly.jpg