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Real Tactics Real Teamwork Real Simulation

About 3CDO

3CDO is a British military-inspired Arma Reforger milsim community focused on realism, teamwork, and immersive gameplay.

We train together, deploy together, and operate as a cohesive unit built on discipline and trust.

Whether you're joining for tactical challenges, social interaction, or to be part of a dedicated milsim family, 3CDO offers a space where teamwork and respect are at the heart of everything we do.

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1000+
Over 1000 active members across operations.
Weekly
Weekly training and operations.
£2,356
Raised for charity through events.
3 Years
Operating continuously for over 3 years.

Our Commitment • Our Journey • Your Squad

Why Join 3CDO

Authentic British Military Structure
Structured like 3 Commando Brigade with defined ranks, troop organisation, and a clear chain of command.
Tactical Gameplay
Realistic objectives focused on coordination, communication, and proper fireteam manoeuvre.
Community & Brotherhood
A disciplined but welcoming environment where teamwork, respect, and camaraderie come first.
Persistent Campaigns
Operations run over weeks, with player actions shaping future missions and outcomes.
Custom Mods & Loadouts
Authentic British equipment, vehicles, radios, and custom mod packs tailored for realism.
Weekly Events
Regular training nights, operations, and large-scale campaigns scheduled each week.

What are you waiting for?

3CDO Logo

Application Process

How to Start

Join Discord

Click here to join our Discord server and get started.

ROP (Recruit Orientation Phase)

Complete orientation and familiarize yourself with 3CDO procedures.

Commando 1 (CDO1)

First phase training with missions and exercises.

Commando 2 (CDO2)

Advanced training, leadership exercises, and tactical operations.

Full Milsim Access

Weapons certifications, qualifications, join larger operations, and experience full milsim life.

ORDER OF BATTLE

Operational units within 3CDO. Each element has a defined battlefield role, command structure, and mission focus.

45Y
Infantry Fighting Unit
Front-line ground combat element responsible for objective seizure, urban clearance, and sustained offensive operations. Capable of deploying up to three full infantry sections.
45W
Weapons & Support
Provides heavy weapons, sustained fire support, and battlefield force multiplication in support of manoeuvre elements.
XRAY
Vehicle Squadron
Armoured and transport vehicle assets delivering mobility, firepower, and logistical support across the battlespace.
CHF
Aviation – Helicopters
Rotary-wing aviation assets providing air assault, reconnaissance, casualty evacuation, and close air mobility.
HQ
Ground Command
Command and control element coordinating operations, intelligence flow, mission planning, and battlefield decision-making.
24E
Fighting Engineers
Combat engineers specialising in breaching, fortifications, demolition, route clearance, and battlefield engineering tasks.
30
Recce
Forward reconnaissance and surveillance unit tasked with intelligence gathering, target acquisition, and early warning operations.

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