Base Upgrades

Versioning

This article is timeless and should be accurate for any version of the game.

Base Upgrades can be unlocked to enable new functionality at their base, nearby Structures, and connected Trench/Bunkers. Upgrades are automatically unlocked over time, at a rate determined by the amount of player activity at this base. Player activity is primarily determined by the number of players that have this base assigned as their Home or Forward Base. Player activity is also influenced by supplying the base and building structures nearby, especially in friendly territory.

Players can also choose to prioritize one Upgrade over another by clicking on it. The Upgrade that is prioritized by the most players progresses the fastest.

You can check a Base's upgrade progress by opening its menu or by putting your mouse over its icon on the map.

Upgrades

Image	Name	Description
	Provisional Garrison	Connects the base to nearby defensive structures. Defensive structures will deactivate if player activity is too low. This also allows Towns to be claimed towards the Victory Condition.
	Small Garrison	A small Garrison permanently connects the base to nearby defensive structures. Prevents nearby structure decay by consuming Maintenance Supplies from the stockpile. Required to upgrade Base to Tier 2.
	Large Garrison	A large Garrison permanently connects the base to nearby defensive structures. Required to upgrade Base to Tier 3.
	Radio Station	Allows this structure to provide map intelligence.
	Artillery Shelter	Reinforces the outer structure's walls, preventing all damage past a threshold unless the structure's critical supports are hit.
	Industry	Enables the construction of logistics structures such as factories, refineries, storage depots.
	Occupied Town	Enables Garrisoned Houses and Safe Houses to be built in this town.
	Fortifications	Enables additional town defenses to be built such as Mortar Houses and Coastal Gun.

Bunker Base Upgrades

For Bunker Bases some upgrades require Infrastructure, which is provided by building Infrastructure Modifications in bunkers connected to the base by trenches or bunkers. Once the upgrades are unlocked the required infrastucture can be removed without losing the upgrade.

Once an upgrade for a specific bunker garrison is unlocked, bunkers that are connected to the bunker base via trenches or bunkers can be modified to become that specific bunker garrison type. The maximum range of the bunker upgrades is a chain of 40 connected bunker/trench pieces (distance to Bunker Base is irrelevant), i.e. the upgrade doesn't reach a bunker if the shortest connection to the bunker base is a chain of more than 40 trench/bunkers. Once a particular bunker has been modified into a bunker garrison it won't lose its modification if its connection with the bunker base is severed, it can even still have its tier upgraded.

Image	Name	Required Modifications	Description
"Garrison" Tree
	Infantry Garrisons	4	Entrenched small arms bunkers manned by stationned troops. Allows connected bunkers to be upgraded into Rifle Garrisons or Machine Gun Garrisons. Requires 4 "Garrison" Modifications.
	AT Gun Garrison	12	Allows connected bunkers to be upgraded into AT Gun Garrisons. Requires 12 "Garrison" Modifications.
	Howitzer Garrison	24	Allows connected bunkers to be upgraded into Howitzer Garrisons. Requires 24 "Garrison" Modifications.
"Command" Tree
	Observation Bunkers	6	Allows Observation Bunkers to be built in this network.
	Concrete Structures	12	Allows Concrete structures to be built in this network. Requires 12 "Command" Modifications.
	Deployment Point	24	Allows players to deploy to this forward base from the Home Region. Requires 24 "Command" Modifications.
	Advanced Bunker	40	Allows construction of Storm Cannon and Intelligence Center. Requires 40 "Command" Modifications.