A volunteer fire department (VFD) is a fire department composed of volunteers who perform fire suppression and other related emergency services for a local jurisdiction. The first large organized force of firefighters was the Corps of Vigiles, established in ancient Rome in 6 AD. The term "volunteer" contrasts with career firefighters who are fully compensated for their services. Some volunteer firefighters may be part of a combination fire department that utilizes both full-time and volunteer firefighters. In this way, a station can be regularly staffed for rapid response with apparatus, and the volunteers provide supplementary staffing and staffed apparatus before, during, and after an incident, or while the full-time career staff are out of service doing training. The term "volunteer" may also be used in reference to a group of part-time or on-call firefighters who may have other occupations when not engaged in occasional firefighting. Although they may have "volunteered" to become members, and to respond to the call for help, they are compensated as employees during the time they are responding to or attending an emergency scene, and possibly for training. An on-call firefighter may also volunteer time for other non-emergency duties as well (training, fundraising, equipment maintenance, etc. )