An Australian Institute of Criminology report (1999) highlighted the health industry as the most violent industry in Australia with registered nurses recording the second highest number of violence. related workers compensation claims, ranking higher than prison and police officers. Workplace violence has become such a common phenomenon that many nurses accept it as a part of nursing. Nurses employed in emergency departments (EDs) are considered to be especially vulnerable to workplace violence. Although there have been a number of studies reporting on the incidence of workplace violence and its consequences upon nurses, to date there have been no empirical studies that have evaluated interventions which are thought to reduce its occurrence and impact. This study investigated the effectiveness of a oneday training program in which ED nurses participated. In particular, their knowledge, skiUs and attitudes relating to management of workplace violence were examined. Results show that a training program has many positive outcomes which enhance nurses' ability to manage aggressive behaviours. With some basic training, ED nurses can be more prepared to manage violent and potentially violent situations, and by doing so may in fact reduce the incidence of aggression in their workplace by 50%. This has largely been achieved by raising the awareness of ED nurses to the nature of the problem, developing their knowledge and skills in managing aggressive behaviour, and improving their attitudes toward potentially violent patients.