The Prague Emergency Service brought help in many cases of mass accidents with 30 to 120 injured persons (explosions, train crashes, plane crashes, tram crashes, etc.) during the years 1955–1979. We have discovered facts from our own experience and by comparison with disasters in other parts of our country. Prague's mobile ICU-type ambulance service has provided advanced resuscitation and life-support by physicians, since the early 1960s, also for multicasualty incidents.

It is necessary to reduce the consequences of mass injuries to a minimum. Some principal questions are: who is to be treated immediately, who can wait, where is help unnecessary?