Peacekeeping refers to activities that tend to create conditions that favor lasting peace.Within the United Nations group of nation-state governments and organizations, there is a general understanding that at the international level, peacekeepers monitor and observe peace processes in post-conflict areas, and may assist ex-combatants in implementing peace agreement commitments that they have undertaken. Such assistance may come in many forms, including confidence-building measures, power-sharing arrangements, electoral support, strengthening the rule of law, and economic and social development. Accordingly, UN peacekeepers (often referred to as Blue Berets or Blue Helmets because of their light blue berets or helmets) can include soldiers, police officers, and civilian personnel.The United Nations is not the only organization to implement peacekeeping missions. Non-UN peacekeeping forces include the NATO mission in Kosovo (with United Nations authorization) and the Multinational Force and Observers on the Sinai Peninsula or the ones organized by the EU like EUFOR RCA (with UN authorization). The Nonviolent Peaceforce is one NGO widely considered to have expertise in general peacemaking by non-governmental volunteers or activists.