Military 15

Lore & Background

In the Factorio world, the military technology chain represents humanity's slow, stubborn refusal to be outgunned by an alien ecosystem. Each tier of military research corresponds to a new class of automated defense—first the crude but reliable gun turrets, then the long-range thunder of artillery, the surgical precision of lasers, and finally the devastating arc of rocket turrets. Military 15 sits at the apex of this escalation, the point at which a factory complex stops being a vulnerable collection of belts and furnaces and becomes, in the truest sense, a citadel.

In Their Own Story

The night the last biter wave broke against the eastern wall, Mara didn't even look up from her console. The rocket turrets had been tracking the spitters since they crested the ridge three minutes ago—slow, deliberate arcs of fire that turned the dark into a strobing orange. The gun turrets handled the smaller ones, a staccato rattle that she'd long since stopped hearing. A laser turret, patient and blue, caught a spitter that had slipped through the gap and simply... erased it. No smoke. No sound. Just a clean line of light and then nothing where the creature had been. Mara sipped her cold coffee, logged the damage report, and queued the next batch of armor plates into the assembler. The factory would not fall tonight. It had never fallen. That was the whole point.

Reader's Guide

Military 15 is a technology in Factorio's research tree that belongs to the military category. It unlocks or enhances the most advanced tier of automated turret and weapon systems available in the base game. To research it, you must have completed the prerequisite chain of earlier Military technologies (Military 1 through the preceding tiers), each of which in turn requires specific foundational techs in ballistics, energy, and materials. In practice, this means you will need a functioning research lab network, a steady supply of the required resources (typically involving advanced components like electronic circuits, processing units, and sometimes rocket parts), and enough lab throughput to dedicate to the research. The tech sits late in the progression, often researched alongside or just after the player has secured their factory perimeter with earlier-tier turrets. Once researched, the newly available or enhanced military items can be placed around your factory to create layered defense: long-range artillery for area denial, laser turrets for fast, energy-based point defense, and rocket turrets for heavy damage against armored biter spitters. The community often builds symmetrical turret walls or concentric rings of mixed turret types, and blueprints for these defensive layouts are among the most shared designs on the Factorio community forums and in-game blueprint sharing. Blueprints interact with the tech tree straightforwardly: you can only place items you have unlocked, so a blueprint containing rocket turrets will only be placeable after you've researched the tech that unlocks them. This makes Military 15 a natural milestone for sharing and importing defensive blueprints from other players.

Did You Know?

• The military technology chain in Factorio is one of the most emotionally resonant progressions in the game, with many players describing the first biter attack as the moment the game 'became real' for them.
• Factorio's turrets are fully automated and require no player input once placed, meaning a well-designed military perimeter can defend a factory while the player is entirely focused on production.
• The biters that attack a factory scale in number and type based on the player's progress, so the same turret wall that was overwhelming at Military 1 becomes a calm afternoon by the time Military 15 is researched.
• Factorio has no traditional 'victory screen' tied to military techs; the satisfaction of the military chain is purely the player's own sense of mastery and the quiet hum of a factory that no longer needs to fear the dark