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HOI4 (Hearts of Iron IV): Collaboration Government Guide

HOI4 (Hearts of Iron IV) Collaboration Government Guide

Hearts of Iron IV (HOI4) stands as a pinnacle of innovation within the esteemed grand strategy series, boasting remarkable commercial success. Developed by the acclaimed team at Paradox Interactive, this game empowers players to wield control over not just a nation but also the very trajectory of the world. Amidst the impending turmoil of World War II, the player’s choices will dictate the fate of their chosen nation. As the global conflict escalates, collaborative governments emerge as a means to effectively manage regional affairs. From the Vichy Government to the short-lived Italian Social Republic, numerous examples abound. In this article, we delve into the intricacies of the collaboration government, exploring their advantages, and offering insights on how to successfully establish and navigate such alliances in HOI4.

How a Collaboration Government Works in HOI4

A collaboration government in HOI4 can be formed when the average compliance of an occupied nation is at least 80%. No democratic country can form a collaboration government, and this is a special type of puppet government.

The following puppet rules apply:

  • Cannot declare wars.
  • Cannot decline a call to war.
  • Cannot control deployed units.
  • Cannot create their own collaboration governments.
  • Cannot be the Spy master.
  • Cannot contribute operatives to the Spy Master.
  • The Overlord can build construction on the puppet’s territory.
  • Technology sharing bonus: -50%
  • Subject Manpower Requirement: +100%
  • Extra trade to the overlord: +100%
  • Overlord trade cost: -90%
  • Civilian industry to overlord: +75%
  • Military industry to overlord: +75%

If one is an overlord, their collaboration government will completely negate the need to manage resistance in the occupied nation, as the collaboration government will have cores on it.

Additionally, since the collaboration government is only above the level of an annexed province, the collaboration government will provide more manpower and factories to its overlord.

How to Create a Collaboration Government in HOI4

A collaboration government can be formed when the average local collaboration of a nation reaches 80%. This can be achieved pre-war or post-war, with the former being much preferred to the latter.

Pre-War, the covert operation Create a Collaboration Government is your best bet. Every successful operation will result in the following:

  • Increases initial starting compliance in occupied states following an annexation by 30-45% per operation, up to 100%
  • Decreases the surrender limit of the nation needed for capitulation

Otherwise, setting up a post-war collaboration government will require heavy investments in garrison equipment as well as a laxer occupation law.

Assuming no covert operations were taken before the annexation, the starting compliance of each occupied state may start at 0%, depending on the initial level of resistance.

Once you manage to raise compliance to 80%, you can use a decision to form a collaboration government in that country’s territories in HOI4.

To get through the compliance levels quickly, the following conditions must be met:

  • The controller is at peace.
  • The controller has a claim (made via war justification or national focus) or considers the state a core state.
  • Little resistance from the state in question or neighboring states
    • Have a division with high suppression as the default garrison template or have a political advisor to help reduce resistance levels.
    • Upgrade Agencies to deal with Anti-Resistance activities better and assign an operative within the state to root out resistance.
  • Going for Civilian Oversight to increase the compliance gain speed
  • Having political advisors or national leaders with compliance gains speed, such as in Carlist Spain, Theocratic Russia, Monarchical Italy, etc.

Benefits of a Collaboration Government

Given that a collaboration government is worse than an integrated puppet but just off the annexed territory label, it’s easy to deduce that a collaboration government will offer more to its overlord than any other puppet type in HOI4.

As mentioned above, one of the great benefits of going for a collaboration government is that it reduces the manpower requirement for your nation (especially great if a minor power) and provides an increased number of factories for the overlord’s usage as well as allow full access to the puppet’s resources.


And that is all you need to know about how to create a Collaboration Government and how they work in HOI4. Check out other interesting HOI4 guides and articles:

Based in Santa Rosa, Philippines, Jonathan Ledesma is a Freelance Writer for Raider King.
Jonathan Ledesma
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