Early-Midgame Military Gear Guide

If biters are starting to pressure your walls, your personal gear, or your ability to expand safely, this is the point where military tech stops being optional. The good news is that early defense in Factorio is simple once you know what to unlock first, what to craft by hand, and what to place around your base. Start with the right research, carry the right weapons, then build defenses you can maintain instead of constantly babysitting. That sequence will keep you alive, hold territory, and let you push nests when you need to.

Unlock the military basics in the right order

Your first priority is getting Automation science pack online, because it opens the whole combat ladder. Automation science pack requires Steam power and Electronics, so make sure your early factory is already stable enough to support both before you try to pivot into defense. Once that is running, go into Military and Gun turret. Both cost Automation science pack×1, and Gun turret is a key early defensive upgrade because it lets you stop relying on your own reaction time every time a wave arrives.

After that, push Steel processing as soon as you can. It also costs Automation science pack×1, and it unlocks Steel plate production plus Heavy armor later on. That matters because better armor improves every combat task you do afterward. Repair pack also sits behind Automation science pack, so you should unlock it early too; once your line is taking damage, being able to repair friendly entities on the spot is far better than waiting for a breach to spread.

A clean research order is simple: get Automation science pack running, then Military and Gun turret, then Repair pack, and then Steel processing into Heavy armor. Do not drift into expansion research first if biters are already waking up near your base. Fix the pressure before you widen the perimeter.

Set up the first weapons and ammo you can actually carry

You do not need an elaborate combat loadout yet, but you do want the right two tools in your inventory. Build a Submachine gun and a Shotgun as soon as you can afford them. The Submachine gun is an upgrade from the pistol: it uses the same ammunition types and deals the same damage as the pistol, but has increased range and a much higher rate of fire. This weapon is installed in the car and tank as well.

The Shotgun fills the opposite job. Use it when you are close enough to punish nests and clustered enemies hard. In practice, you should keep both weapons on you and swap between them instead of trying to force one weapon to do everything. Use the Submachine gun against biters, then switch to the Shotgun for close-range nest damage. That is the efficient pattern, and it saves ammo while making your pushes much faster.

For ammunition, start with Shotgun shells and move to Piercing shotgun shells once steel production is online. Regular shells are cheap enough to support early fighting, and they are the right choice while your factory is still scaling. Piercing shotgun shells cost steel, so they are your upgrade path once your plate economy can support them. Do not rush them if steel is still strained; you will usually get more value from keeping your guns supplied than from making expensive rounds too early.

Here is a quick reference for the core military recipes and what you get from them:

Craft the armor and repair tools that keep you alive

As soon as Steel processing is available, make Heavy armor. It costs Copper plate×100 and Steel plate×50, so it is not trivial, but it is worth prioritizing because it dramatically improves your survivability. Heavy armor provides more protection than light armor, nearly nullifying the damage from small biters and also providing respectable protection against medium biters, spitters, and worms.

It also provides excellent protection against accidental self-inflicted damage from grenades, which is easy to forget until a fight goes wrong. If you are using explosives around your own walls or nests, Heavy armor gives you a much safer margin for error. Get it before you start doing aggressive frontline work.

At the same time, craft Repair pack and keep some on you whenever you are placing turrets or fighting near damaged structures. The recipe is cheap enough that you should treat it as standard field gear. Because Repair pack is used to repair friendly entities, it lets you patch up turrets and other defenses before minor damage turns into a hole in the line. That small habit saves a lot of emergency travel and prevents avoidable breaches.

Build a turret line you can maintain instead of constantly babysitting

Your first real wall defense should be a small turret line covering the most likely attack paths, not a huge perimeter that you cannot support. Build Gun turret defenses where biters are already approaching or where your base has a clear weak point, and leave the rest until you can actually feed and repair the line. A few well-placed turrets do more work than a thin ring of half-supplied structures.

The reason Gun turret is so important is that it is a stationary gun turret entity that provides automated ground defense against hostile units. It also stacks up to 50 per inventory slot, which means you can carry a useful reserve while expanding, repairing, or setting up a new outpost. That makes turrets one of the most convenient emergency defenses in the game: if a new front opens, you can move fast and fortify it without hauling a full logistics chain.

If you want nearby storage at the front, use Steel chest. It costs Steel plate×8 and gives you a simple way to stock Gun turret, ammo, or Repair pack close to your line. That keeps your response time short when a wall section starts taking damage. Do not overcomplicate this: a small chest with ammo and repair supplies near the front is often enough to keep a weak position stable while you expand elsewhere.

Scale safely as copper and steel demand starts to bite

The main trap in early military planning is treating defense as separate from the rest of the factory. It is not separate; it competes for the same Iron plate and Copper plate you need for expansion, electronics, and military production. Copper plate is made by smelting copper ore in a furnace, or by casting it in a foundry, and copper use tends to rise heavily with the mass production of electronic circuits and other copper-consuming resources. If your military goals keep stalling, the bottleneck is usually not the turrets themselves — it is upstream plate output.

Steel plate is the other pressure point. It is made in a Stone furnace from Iron plate×5, and it takes 16s per plate, so it is much slower than basic smelting. That means Steel plate will feel scarce right when you want Heavy armor, Piercing shotgun shells, and better defensive infrastructure. If steel is holding you back, add more iron throughput first, then dedicate enough production to steel so you can keep your armor, ammunition, and base all moving at once.

The practical rule is this: if defense is slowing down, do not only add more combat items — increase plate production. More iron and copper upstream will solve more military problems than another rushed line of turrets. Once your plates are flowing, you can keep the defensive kit stocked, upgrade to Heavy armor, and push outward with much less risk.