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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.

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.

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.

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.

Recce

Forward reconnaissance and surveillance unit tasked with intelligence gathering, target acquisition, and early warning operations.