TCCC stands for Tactical Combat Casualty Care, a set of evidence-based trauma care guidelines designed specifically for treating injuries on the battlefield. Developed between 1993 and 1996 through a joint effort by special operations medical personnel and the Uniformed Services University of the Health Sciences, TCCC was the first system to combine effective emergency medicine with the realities of small-unit combat tactics. It remains the standard for prehospital trauma care across the U.S. military.
Why TCCC Was Created
The program began as a Naval Special Warfare biomedical research project after military medical leaders recognized a striking problem: extremity hemorrhage was a leading cause of preventable death on the battlefield, yet troops weren’t consistently using a simple, highly effective intervention, the tourniquet. That gap between available tools and actual practice prompted a three-year effort to systematically reevaluate every aspect of battlefield trauma care.
Before TCCC, combat medics largely followed the same protocols used in civilian emergency rooms. Those protocols assumed a safe scene, abundant supplies, and rapid hospital transport. None of those assumptions hold true in a firefight. TCCC reordered priorities around what actually kills people in combat and what can realistically be done while bullets are still flying.
The Three Phases of Care
TCCC divides battlefield medical response into three phases, each defined by how much danger is still present and what resources are available.
Care Under Fire
This is the most dangerous phase. The casualty and the responder are still under hostile fire. The primary goal isn’t medical treatment at all. It’s achieving fire superiority to suppress the threat and moving the injured person to cover. The only medical intervention typically performed here is applying a tourniquet to stop life-threatening limb bleeding. An unresponsive casualty at this stage is generally considered beyond the scope of what can safely be attempted, and any rescue attempt is weighed against the risk of creating more casualties.
Tactical Field Care
Once the casualty reaches cover and the immediate threat is reduced, more thorough medical treatment begins. This is where the bulk of TCCC interventions happen: controlling bleeding, managing airways, treating chest injuries, starting fluids, and administering medications for pain and infection prevention. The environment is still hostile, so providers work with limited equipment and must stay ready to move.
Tactical Evacuation Care
This phase covers the transport from the battlefield to a medical facility. Care continues with ongoing monitoring and additional interventions that weren’t possible in the field. Providers may have access to more equipment, better lighting, and a somewhat more stable environment inside an evacuation vehicle or aircraft.
The MARCH Algorithm
Within Tactical Field Care, providers follow a specific treatment sequence called MARCH. The order reflects what kills fastest. Each letter represents a priority, addressed in sequence:
- M: Massive hemorrhage. Severe bleeding is the number one preventable killer in combat. Tourniquets go on first for limb injuries. For wounds on the torso, neck, or groin where a tourniquet can’t be used, providers pack the wound tightly with hemostatic gauze, a specially treated material that accelerates clotting. They apply direct pressure for about three minutes until bleeding stops.
- A: Airway. If the casualty is conscious with facial trauma, the current guideline is to have them sit up and lean forward to keep the airway clear. Unconscious casualties without airway obstruction are placed in the recovery position with the chin tilted away from the chest. A 2024 update removed the jaw thrust maneuver and extraglottic airway devices from the recommendations, simplifying this step. When all else fails, providers perform a surgical airway (cutting into the throat to insert a breathing tube).
- R: Respiration. Penetrating chest wounds can cause a collapsed lung. A sucking chest wound gets sealed with an airtight dressing taped on all four sides. If air pressure builds up inside the chest cavity and compresses the lung (tension pneumothorax), providers insert a decompression needle into the chest wall to release the trapped air.
- C: Circulation. This covers shock prevention and fluid resuscitation. For casualties with signs of hemorrhagic shock, providers administer a clot-stabilizing drug (tranexamic acid) as a single 2-gram dose through an IV or directly into the bone. The guidelines emphasize giving this drug early, and a recent update expanded its use to include significant traumatic brain injuries.
- H: Head injury and hypothermia. Providers assess for traumatic brain injury and take steps to prevent the casualty’s body temperature from dropping, since hypothermia impairs blood clotting and worsens outcomes.
Approved Equipment
The Committee on Tactical Combat Casualty Care (CoTCCC) maintains a list of specific devices approved for battlefield use. Not every tourniquet or hemostatic product makes the cut. Each must pass testing to earn a recommendation.
Approved limb tourniquets include the Combat Application Tourniquet (CAT) Gen 6 and Gen 7, the SOF Tactical Tourniquet-Wide, the SAM Extremity Tourniquet, and several others. For hemostatic dressings, approved options include Combat Gauze (the most widely issued), Celox Gauze, ChitoGauze, and X-Stat, a syringe-like device that injects small expanding sponges into deep, narrow wounds that are difficult to pack by hand.
Battlefield Medications
TCCC guidelines include a standard set of medications that combat medics and even non-medical personnel carry. For pain management, the first-line option for a casualty who can still fight is a “combat pill pack” containing an anti-inflammatory (meloxicam, 15mg) and two extended-release acetaminophen tablets (650mg each). For severe pain, morphine is administered by auto-injector every four hours as needed, though it’s contraindicated in casualties with head injuries, altered consciousness, low blood pressure, or difficulty breathing.
Antibiotics are recommended for all open combat wounds. The standard issue is a single daily 400mg tablet of moxifloxacin, started as soon as possible in the field. The rationale is straightforward: battlefield wounds are heavily contaminated, and hours or days may pass before the casualty reaches a surgical facility.
How TCCC Differs From Civilian Protocols
TCCC was written for a specific population: otherwise healthy soldiers aged 18 to 45, treated by providers operating under military scope of practice. A civilian adaptation called TECC (Tactical Emergency Casualty Care) exists for law enforcement, EMS, and civilian active-shooter response, but the two systems are distinct.
Several TCCC practices can’t be directly transplanted to civilian settings. Battlefield antibiotics, needle decompression by non-medical personnel, and certain fluid resuscitation products fall outside civilian scope of practice and liability standards. TECC adapts the core threat-based framework of TCCC while accounting for the civilian patient population (which includes children, the elderly, and people with chronic conditions), different legal requirements, and the terminology differences between fire, EMS, and law enforcement agencies. The phrase “Care Under Fire,” for instance, means something very different to a firefighter than it does to a paramedic or a police officer.
Ongoing Updates
The CoTCCC continuously reviews battlefield data and published research to refine the guidelines. The most recent major update, approved in 2024, overhauled airway management recommendations. It removed several previously standard devices and techniques, added continuous monitoring with capnography (a sensor that confirms a breathing tube is correctly placed by measuring exhaled carbon dioxide), and introduced specific guidance on ventilation support for casualties whose oxygen levels drop below 90%. The committee also shifted responsibility for evacuation-phase airway care to a separate body focused specifically on enroute care, reflecting the growing specialization within military trauma medicine.
These updates happen because TCCC is built on outcomes, not tradition. When battlefield data shows that a technique isn’t working or that something better exists, the guidelines change. That cycle of real-world feedback and evidence review is a large part of why preventable combat deaths have dropped significantly since TCCC was first adopted.