The Royal Marines MilSim Unit

"Per Mare, Per Terram"

This is ArmA III's largest Commando simulation unit.
It's a state of mind.

About Us

The Royal Marines MilSim Unit is a British Milsim Unit that takes on the role of Royal Marine Commandos.

Our main focus is to provide a immersive experience, packed with enjoyable moments, memorable conversations and adrenaline pumping engagements.

See our latest campaign video here:


The Royal Marines Milsim Unit, (, is in no way associated with the real 45 Commando or the Royal Marines. The Royal Marines MilSim unit is a military simulation group based on the real life Royal Marine Commandos and created in ArmA III.


If you would like to support the RMMU with server running costs, please donate below: