This document sets out the guiding principles and core objectives of UN Peace operations, as well the main factors contributing to their success in the field. It also provides a basis for the development of training materials for military, police and civilian personnel preparing to serve in the field. The document draws on the contemporary peacekeeping practices; seminal documents such as An Agenda for Peace [A/47/277 - S/24111], Supplement to an Agenda for Peace [A/50/60 - S/1995/1] and the Brahimi report [A/55/305 – S/2000/809]; as well as internal lessons learned materials, external research and academic commentary.