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Logistics reference

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== Supply Depots ==
Supply depots (aka "supply sources" or "supply centers"), are a physical location on the map where all excess supply in a nation's supplies are automatically storedlandmass region will try to travel to each day 1 province per day. All supplies created for The national supply tooltip information is a direct extraction of all the values of the national stockpile are either stored capital province in supply depots, in transit map mode. If supply production is currently on in the production tab then a tooltip on that slider will show how much supply network, or are actively consumed by unitswill be produced for the next day. In this sense, That value on the next day at 000 will deploy divided amongst all IC provinces in your land that can draw a supply counter in line to the main screen toolbar is capital stockpile. If its overseas then it will only an abstract aggregate: there deploy overseas if a supply convoy is no single national stockpilesetup to the landmass. # Every country has Effective IC is the modified IC value of a primary province. Overseas, war damage, and occupation policies effect the IC values of provinces therefore core unthreatened IC provinces will always recieve more supply source located in its capitaleach day from production than overseas frontline IC provinces.
# The overseas supply source for any territory not connected to a nation's main land is a port.
# Supplies The tooltips for the national stockpile on the top of the screen are automatically distributed :Into network= How much supply is transferring from your capital land province into adjacent provincesConvoyed out= How much supply is being sent out in convoys each day(supply does not travel from the capital to a port to ship out through a convoy, supply source will magically just ship out with no effect on the supply map mode. Returned to all core national stockpile= Excess supply that is transferred into the capital province that day from adjacent provinces with ICor a convoy from a landmass that is empty of units but has supply present in it. Traded away= supplies you are selling to a nation or supplies distributed to an ally to cover costs of your units operating in their supply networksTraded for= Supply coming in from nations you bought supply from. Used= Supply used by units locally in the capital province. Produced= the value from the previous day in the production slider tooltip for supply production.  
== Supply Network ==
The game has one principle supply network method used for transporting supplies on land and overseas:
# All units draw supply by requesting it from the province they are located in. # If a Each province cannot starting from the unit's location leading back to the supply a local unit, stockpile it is listed as being "supplied from" will request supply supplies from an adjacent the province:next in line never deviating more than 90degrees from a path towards the stockpile unless sea zones force a deviation. ## The first If the next province in line doesn't have any supply in it to transfer the province asked will be show as red, if the one located closest province does not have fuel it will show yellow. If it has supply but not enough to meet the needs it will be brown. Green with red hatchmarks is supply sourcethroughput maxed provinces is land that is at its max throughput. ## Every other adjacent request to a province will for supply includes a supply transfer cost that can be asked effected by revoltrisk if a previously asked province cannot provide supplythe land is occupied/annexed. ## If one adjacent province cannot meet the total supply need, multiple adjacent provinces may be usedbut never beyond a 90 degree arc in the direction of a stockpile. ## Each province between the requestor and a supply source will carry the request for supplies forward, aggregating other supply requests as appropriate.## Supply moves one province per day. Very often the supply units are recieving never came from a stockpile. Ports recieve fresh supply each day in most cases for a landmass and every day if supply production is on, IC provinces in the region recieve supply as well that can be injected into the supply lines to help with long supply lines.
===Manual Control===
There are three ways for a player to manually manipulate the supply network:
# '''Transport planes:''' While transport planes are very expensive, carry limited supplies, and generally require air superiority, they can surgically augment areas with supply problems.
## Supply missions can be used to siphon supply out of a large stockpile towards the front faster and more efficiently than land in low infrastructure regions. # '''Convoys:''' AI control of convoy creation and destruction can be turned off, allowing a player to manually create convoys.## If a landmass stockpile is beyond a certain value convoys will stop shipping supply till the stockpile drops down to a level where it needs supply again. ## Stockpile thresholds are a calculated equation based on the demand of the stockpile province on any given day multiplied by a certain amount of days, generally any stockpile over 40k stockpiled will not allow for convoys to ship supply till it drops below that. This value could be higher if the landmass has a great many units on it.
# '''Supply re-route:''' Starting in Semper Fi, it is possible to create sea convoys to improve the supply flow to areas already connected via land to the supply depot (Lenningrad and Vladivostock: in addition to a land connection, can also have a sea connection). This can happen so long as the provinces involved are separated by at least 10 provinces.
* Brown shows province has a supply deficit: demand is higher than throughput. Effected by infrastructure level, terrain, or tech level.
* Red hatching shows limitation being imposed on the infrastructure.
* Red shows demand draw is greater than required, the province may or may not have 's local supply, throughput value is zero0.
For more details, view this post [ by potski] on the HOI3 forums explaining the supply map and many intricacies and implications of supply draw.
=== Allies & Puppets ===
When units are in an allied nation, supplies will be drawn from the allied supply network. Meanwhile, an automatic and invisible trade route will be created between the two nations, where the exact amount of supplies and fuel will be sent from the nation with its troops abroad to the allied nation hosting those troops. As a result Some minor allies and most puppets will relinquish control of this system, supplies, fuel, supply in the region to their master nation or resources cannot be transferred through a puppet or allymajor nation with better doctrine/techs for supply. For exampleExample: consider that Japan is fighting near Beijing Manchukuo will never retain a stockpile in its capital and has existing supply through north-eastern ports will always be supplied from japan's port stockpile in Chinaasia. Japan They will not get supplied through Manchuoko by the Korean constantly produce double daily supply because their supply network. Note also that the "transit rights" agreement system is only applicable to unit movement and stationing, and does not have a bearing on suppliesbasing its values off an empty capital province.
==Supply Throughput==
There are several factors that limit the distribution of supplies:
# '''Supply Tax:''' Moving supplies costs a base tax of 0.1 supplies (decreased by Supply Transportation techs) per province moved through.
# '''Port Size:''' For overseas supply sources, the size of the port (each level equals 4 supplies) limits the amount of supplies that can be convoyed.
# '''Air Base SizeRevolt Risk:''' Each level can support 4 Revoltrisk multiplies the supply tax causing less supply in a province to be for units. Thus, a level 10 airbase can ahead in the line causing reduced supply 40 air wings maximumthroughput indirectly. # '''Partisan Activity:Occupation vs Annexed''' Partisans Occupied land has the lowest throughput, Annexed AKA Owned and controlled, has a bonus applied to the same occupied throughput causing it to have better balues and core owned territory has no penalty for throughput. If you are unsure what a province is, when selecting the province if it has your flag on it with no circular emblem on it then it is owned and controlled, if it has an enemy flag and your emblem is on top of that flag then you are occupying. Core territory will disrupt have your supply emblem in any province with partisan activitythe bottom left stating you have core on the land, decreasing your supply throughputits also represented in revoltrisk mapmode as having 0 local revoltrisk.
Supply Throughput can be improved through the following methods:
# Supply Transportation research reduces the supply tax per province.
# Laws can also affect supply throughput. Mixed Industry gives 5% bonus to throughput while Heavy Industry gives a 10% bonus to throughput.
# Less draconian occupation policies will decrease partisan revoltrisk activity and improve supply throughput in occupied territory.
# The [[command structure|Army Group HQ]] will improve logistics by 5% based on each skill level of its commander.
# Building new infrastructure will increase the throughput of that province.
# Building IC in a core province without IC will create a new supply source and possibly improve nearby supply distribution. Never deploy IC to provinces outside of core/capital landmass locations.
=== Effect of Infrastructure ===

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