Technology
Throughout a war, Technology in each faction slowly progresses. New weapons, structures, and vehicles technologies become available. The progression isn't automatic but player driven. All things related to tech are done at Engineering Centers where the Technology Tree can be viewed.
Categories
There are two separate categories in the tech tree of a faction (one for vehicles 
, and one for weapons and structures 
). Each category progresses independently from the other. The position of each technology in the tree can change between wars.
Research Levels
Research Levels, also known as Technology Levels, are the lines in each category where equipment is researched in order to be unlocked. On each level, the technology (aka the piece of equipment) on the left side of the divider is where players submit various Technology Materials, producing Prototype Kits, and progressing that technology. The technologies on the right side of the divider are the equipment that automatically unlocks when the Research Level is completed.
Prototype Kits are produced with Iron Alloy, Copper Alloy, and Aluminum Alloy. The type and quantity needed for a particular Prototype Kit is displayed by putting your cursor on that tech's icon. Once created the kits allows players to produce a number of objects and prototype versions of vehicles and structures that are not yet available for normal production.
Multiple researchable technologies can be progressed simultaneously, with the unlocked technology becomes widely accessible for production for the entire faction when the Research Level is filled to 100% (each level requires a different amount to fully unlock).
Not all levels are immediately visible to the faction, as it will only show three levels ahead of the current level, and the rest are marked as 'unknown'. Progressing down the tech tree will reveal these hidden levels.
Special Technologies
There are two technologies in the Weapons and Structures category which are not actual structures or weapons.
Tier 2 Facilities 
Allows the construction of the following buildings:
- Catwalks
- Facility Crane
- Ammunition Factory and all of its upgrades
- Stationary Harvester (Components)
- Stationary Harvester (Sulfur)
- Field Modification Center
- Pipelines
- Power Station
- Metalworks Factory
- Liquid Silo
- Large Assembly Station
- Railway Tracks
- Large Crane
- Crane Railway Track
Allows the following upgrades:
- Electric Oil Well
- Excavator (Components)
- Coal Liquefier
- Cracking Unit
- Battery Line
- Field Station
- Tank Factory
Tier 3 Facilities
Allows the construction of the following buildings:
Allows the following upgrades:
- Sulfuric Reactor
- Engineering Station
- Advanced Coal Liquefier
- Petrochemical Plant
- Weapons Platform
- Train Assembly
- Heavy Tank Assembly
- Excavator (Coal, Salvage, Sulfur)
Trivia
- Foxhole's technology mechanic has changed over the course of its development, with the previous iteration being closer to the current version. There used to be Tech Choices, where there could be two (or more) unlockable technologies in competition. These would be "voted on", with the level's progress being the sum of progress for all competing technologies, i.e. equaling 100% (e.g. 80% done on one tech and 20% on the other).
- Once a Research Level is completed, the other competing technologies are locked. After every research level is completed once, the tech tree category returns to the first level with unfinished technologies.
- This would later be changed to include one tech choice, removing the possibility to be unable to produce a piece of equipment for a while (and potential inner-faction conflict).
- For a few years both factions had a "technology group" (Warden Tech Maids and Colonial Tech Quartermasters) where many players and regiments would voluntary donate their tech material to their factions respective group. These tech groups would hold on to tech material and often would have thousands stored at any given time. They would follow the "voted on" results and monitored how the tech tree responded, counting pixels to get the exact amount of progress per prototype kit produced. At this time the way the tech tree was coded, depending how much the enemy had researched affected the rate of your factions research. If one faction researched a handful of prototype kits, the other faction could tell based on "kits per pixel" (KPP). If PPK was low, then that means the enemy faction produced prototype kits and your faction would receive a boost on PPK meaning that if you had a stockpile of large amounts of tech material, you could gain the system and get more bang for your buck, in some cases multiple tech tiers unlocked in less than an hour. Eventually the developers tweaked how the tech system worked making gaining the system more difficult and less effective. Both tech groups eventually disbanded.
Gallery
A Vehicle Tech Tree and a Weapons and Structures Tech Tree from the Wardens from War 110
Colonial Tech Trees from War 115
Warden Tech Trees from War 115
