Hearts of Iron 4 supply guide – everything you need to know


So, you want to know more about the provisioning of Hearts of Iron 4? The recent expansion of the grand strategy game, No Step Back, as well as the free patch 1.11 brought significant changes to how supply and logistics work. Not all of these changes were clearly explained either, leaving many players a bit confused.

We’re here to help clear things up and provide a basic primer on the new supply mechanics and how they interact with the game’s combat mechanics. clear behind these changes, as game director Peter Nicholson recently hinted – just because things go wrong doesn’t mean the system doesn’t work as expected.

We’ve drawn on a few sources to help you put together this guide. FeedBackGaming’s rather ad hoc tutorial video explains things quite well, but it’s worth reviewing the relevant dev logs as well, although it’s worth noting that many of the previously discussed features have changed over the course of the game’s development. supply system.

Hearts of Iron 4 New Supply System

It’s important to note that, in essence, provisioning basically works the same way. Most of your nation’s supply comes from the capital, just like before No Step Back. However, the way supply radiates to your armies has changed significantly.

Procurement is now managed at the provincial level rather than at the state level. Individual provinces have a local supply pool that divisions can draw from, which is determined by local population levels and state infrastructure. Otherwise, this supply is entrusted to the national grid.

Domestically, supply is taken from your capital city and routed outwards through your rail network to supply hubs. A supply hub is only considered active if there are divisions nearby that need supply, otherwise it is sent along the network to the next active hub.

HOI4 supply – hubs and railways

The amount of supply a supply hub is able to handle depends on the level of rail network between the capital city and that hub – including any other hubs the supply passes through along the way. The lowest value railroad will cap the level of supply a hub can send or hold to give to local divisions, which both use the same value.

If you have three rail segments between a hub and the capital, and one of those segments is level one but the others are level two, the supply hub will only be able to handle 10 supplies. Either he will send 10 further down the network or he will only have ten supplies to distribute to local divisions. The first level rail network acts as a bottleneck.

It is therefore important to ensure that each segment of the railway between important supply centers and the capital is maintained at the same level. Some additional tips:

  • It doesn’t matter how long the track is, what matters is the level of each stretch of track.
  • If you click on a supply center in supply map mode, three buttons will appear. One of them is to upgrade the entire rail network between it and the capital to the same level.
  • Supplying a rail route will require your nation to have a supply of trains – if you don’t have one for some reason, supply won’t be routed to supply hubs in the first place.
  • Building railways is the same as building buildings and other things through the construction interface, although they are relatively cheap in terms of production value.

Hearts of Iron 4 supply – supplying armies

Once the supply has reached the hub(s) closest to the front line, it must then be able to reach the combatant divisions so that they can maintain their combat effectiveness. Several factors can influence how supply reaches divisions, including:

  • The level of state infrastructure
  • The level of motorization of the supply hub
  • If a division accesses more than one hub

The level of motorization is something that easily goes unnoticed. Supply can be done from the hubs either by simple means, represented by a horse symbol on the interface, or by different levels of motorization using trucks.

Trucks have greater range, but they also require trucks to be present in your National Stock to be used. Unlike trains, in theory you would build trucks anyway, as they also serve as equipment assigned to divisions of certain support companies like field hospitals, although it’s worth bearing in mind that you now have more things competing for the global “truck” resource, so you’ll need to make sure you build a lot of them.

A pro tip: you can set the motorization level either at the individual supply center level or at the army level via the army interface screen. This army will then automatically modify the motorization level of each supply center it is within range of. Once it moves out of range, this supply hub will default back to its original setting.

Also note that divisions now carry a base amount of supply with them at all times, assuming they can access the supply network to resupply. It is also now more normal for divisions not to be constantly at 100% supply. This will take some getting used to, but Nicholson expands a bit on when players should be actively concerned about supply issues.

Hearts of Iron 4 supply – tips and tricks

A province can only have one supply center, and supply centers only have one level of existence, unlike railroads, forts, or ports.

The premium features associated with the supply system that you will need the No Step Back expansion for are the Logistics Strike air mission, which targets trains and railroads, and the Scorched Earth state interaction which will sabotage not only the infrastructure of the state, but also the railways as well. You can also build Mulberry Ports to facilitate naval invasions.

Supply Centers are prohibitively expensive without the special decision aid that most nations have access to, making them faster to build. For context, the cost is the same as two civilian factories, so you really have to plan when you’re going to build more. It will probably almost always be easier to just take over existing supply hubs.

If you think your railroad and infrastructure is good but you’re still having supply problems, make sure you have enough trucks, trains or, if an overseas route is involved, convoys. Also keep in mind that terrain can have a huge impact on supply, as it did before the changes.

Related: Hearts of Iron 4 cheats and console commands

Finally, remember that the size and number of divisions in an area will ultimately determine the quality of your supply situation. The current meta seems to be moving away from large divisions in favor of smaller ones, but no matter how small, too many people in one place will overwhelm any supply network, no matter how good.


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