Overview of Incidents Involving Mass-Casualty Weapons By James M Madsen, MD, MPH, U S.Army Medical Research Institute of Chemical Defense (USAMRICD) Reviewed / Revised Jan 2023 View Patient Education Initial Approach Treatment Topic Resources Triage Classification ASBESTOS *: Secondary Assessment... Mass-casualty incidents (MCIs) are events that generate sufficiently high numbers of casualties to overwhelm available medical resources.