Milsim core is a ready-made set of four mods that most Arma 3 units start from. You add it in one step instead of searching for each mod. What each mod needs comes with it.
What is in it
The panel describes it as “ACE3, Task Force Radio for in-game radios, Zeus Enhanced for game masters and LAMBS for smarter AI.”
- ACE3 adds medical care, ballistics and many interactions. See ACE3 on your server.
- Task Force Radio adds in-game radios.
- Zeus Enhanced adds more modules and easier controls for whoever runs the game as Zeus (the game-master mode where one player runs the mission live).
- LAMBS makes the AI act smarter.
The framework mods these need, such as CBA, are added with them.
Add it
- Open the Mods page and choose the Presets tab.
- In Modpacks, find Milsim core and choose Add.
- The box Add Milsim core shows how many mods go on the list, how many are there because another mod needs them, and the size to download.
- Choose Add (number).

The mods wait on your list. Nothing downloads yet. Go to the On this server tab, then choose Apply (server stopped) or Apply and restart (server running). A running server stops, downloads and starts again, and that drops everyone who is on. Warn them first with A message to everyone on the Players page, then choose Send. See apply mod changes.
Radios: pick one set
Milsim core uses Task Force Radio. The panel also offers an ACRE2 radios pack and says to choose it or Task Force Radio, not both. If you want ACRE2, do not add Milsim core. Add the ACE3 pack and the ACRE2 radios pack from Modpacks, then Zeus Enhanced and LAMBS from the Workshop tab.
Tell your players
Every player must load the same mods. On the Presets tab, choose Download the preset under Give players the server’s mods, and send the file to your players. They drag it onto the Arma 3 Launcher. See give players a preset.
If it does not work
- The pack shows On the list. It is already added.
- Some mods were not downloaded. The panel names them after the apply and leaves them on the list, waiting. Apply again later.
- Players cannot join with a signature error. Their mod versions differ from the server’s. They update their mods in the Launcher.
- The list is too big. A server holds at most 200 mods.
More about the game: Arma 3 servers.