What Is TCCC? The Three Phases of Tactical Combat Casualty Care

Tactical Combat Casualty Care (TCCC, often said “T-triple-C”) is the set of trauma guidelines that transformed battlefield survival over the last two decades — and its core ideas now drive civilian bleeding-control training too. Understanding TCCC helps you see why we treat trauma in a specific order. This article breaks down its three phases and the MARCH sequence in plain language. It's part of our tactical medicine guide.

Where TCCC came from and why it works

TCCC was developed to answer a hard question: what actually kills people on the battlefield, and which of those deaths are preventable? The data pointed to a short list — above all, uncontrolled extremity bleeding — and TCCC reorganized care around stopping those specific killers first. The results were dramatic enough that the guidelines spread from special operations to the entire military, then to law enforcement, and finally into civilian programs like Stop the Bleed. The lesson for everyone: treat the thing most likely to kill someone right now, in the order it's likely to kill them.

The three phases of TCCC

TCCC recognizes that where you are changes what care is realistic. It divides care into three phases based on the threat level.

1. Care Under Fire

This is care given while still under active threat. The priorities are brutally simple: win the fight and stop massive bleeding. The best medicine here is suppressing the threat and moving to cover. The only medical intervention that usually makes sense under fire is a tourniquet on a limb with life-threatening bleeding — fast, high, and tight. Everything else waits.

2. Tactical Field Care

Once you're behind cover and the immediate threat is managed, you have time and (relative) safety to work the casualty methodically. This is where the full MARCH assessment happens (below). You reassess bleeding, manage the airway, seal chest wounds, and prevent shock.

3. Tactical Evacuation Care

This phase covers care during transport to a higher level of care — in a vehicle, aircraft, or ambulance. More equipment and monitoring become available, and the focus shifts to keeping the casualty stable during the trip.

MARCH: the order that saves lives

The heart of TCCC's field care is the MARCH algorithm — a memory aid that puts interventions in the order most likely to keep someone alive:

• M — Massive hemorrhage. Stop major bleeding first. Tourniquets, wound packing, and pressure.
• A — Airway. Open and protect the airway; position or use an airway adjunct.
• R — Respiration. Treat chest injuries — seal sucking chest wounds and watch for tension pneumothorax.
• C — Circulation. Reassess bleeding control, check for shock, and preserve what blood volume remains.
• H — Hypothermia / Head injury. Keep the casualty warm; even in heat, injured bodies lose heat and clot poorly when cold.

MARCH flips the traditional “ABC” order because bleeding, not airway, is the most common preventable cause of trauma death. A pocket reference like the MARCH cards keeps the sequence in front of you under stress, and our MARCH protocol guide walks through each step in detail.

The gear that supports each step

TCCC-aligned kits are built around MARCH. A CoTCCC-recommended tourniquet like the C-A-T Generation 7 handles the “M,” and a vented chest seal covers the “R” — seals for penetrating chest wounds are covered in our chest seal breakdown. The point isn't to buy every gadget; it's to carry the few items that address the actual killers, and to know how to use them. Tourniquet technique is in how to apply a tourniquet in under 30 seconds.

Does TCCC apply to civilians?

The medicine does; the tactics are adapted. Civilians won't be “under fire” in the military sense, but the principles — stop bleeding first, work in a logical order, keep the patient warm — apply directly to car crashes, industrial accidents, and everyday trauma. The civilian adaptation is called TECC (Tactical Emergency Casualty Care), and courses like Stop the Bleed teach the most important pieces to anyone.

Frequently asked questions

What does TCCC stand for?

Tactical Combat Casualty Care — a set of evidence-based battlefield trauma guidelines maintained by the Committee on TCCC (CoTCCC).

What's the difference between TCCC and TECC?

TCCC is the military doctrine; TECC (Tactical Emergency Casualty Care) is its civilian adaptation for law enforcement, EMS, and the public. The medical priorities are nearly identical.

Why does MARCH put bleeding before airway?

Because uncontrolled hemorrhage kills faster and more often than airway problems in trauma. You address the most probable killer first.

Do I need to be military to learn TCCC principles?

No. Civilians can take TECC and Stop the Bleed courses that teach the same bleeding-control and MARCH concepts in a non-combat context.

What single skill matters most from TCCC?

Rapid, correct tourniquet application for life-threatening limb bleeding. It's the intervention with the clearest life-saving track record.

Start here: This is a foundational piece of tactical medicine. For the complete picture — range safety, loadouts, and casualty movement — read our tactical medicine guide.

Disclaimer: This article is for educational purposes only and is not a substitute for professional medical care or certified training. Seek qualified instruction (e.g., Stop the Bleed, TCCC) before relying on any trauma equipment.