This is a presentation to discuss the ‘Lessons Learned’ from recent incidents. Terrorism struck the city of Paris on November 13, 2015. It was the deadliest disaster in France since World War II, killing 130 people and wounding 352. The Paris prehospital care organization is a two tiered response system served by 200 basic life-support ambulances and 35 emergency medical teams from the Paris Fire Brigade and emergency medical services (SAMU). Specific measures were anticipated in the event of shootings like the Charlie Hebdo attack in January 2015. However, regardless of the preparedness, each disaster possessed specific features. The November 13 threat featured polymorphism, persistence, spatial temporal proximity, and risk scalability. It is frequently observed that hemostasis and damage control owe a great deal to military medicine, especially during terrorist attacks. On this occasion, lessons from Tactical Combat Casualty Care were also helpful for the rescue teams. The medical teams did indeed provide care under fire. The fire brigade’s medical teams also provided tactical field care. Meanwhile, further damage control was ensured as soon as possible during the evacuation of the victims to trauma centers. These tragic circumstances demonstrated the ability of various actors in the health field to work together towards the same goal. On November 13, this cohesion saved lives.