Impartiality (Peacekeeping)

Impartiality is one of the three bedrock principles of United Nations peacekeeping, alongside consent of the parties and non-use of force except in self-defence and defence of the mandate. The principle was articulated in early operations under Secretary-General Dag Hammarskjöld and codified in contemporary doctrine in the UN's Capstone Doctrine (formally the United Nations Peacekeeping Operations: Principles and Guidelines, 2008).

Crucially, impartiality is not neutrality. A neutral actor treats all parties identically regardless of their conduct; an impartial peacekeeper applies the mandate evenhandedly but will call out and respond to violations by any side. The Capstone Doctrine compares the peacekeeper to a referee: the referee does not favor a team, but does penalize fouls. This distinction was sharpened after the failures in Rwanda (1994) and Srebrenica (1995), where the Report of the Secretary-General Pursuant to General Assembly Resolution 53/35 (the Srebrenica Report, 1999) and the Brahimi Report (A/55/305–S/2000/809, 2000) concluded that treating aggressors and victims identically had undermined UN credibility.

In practice, impartiality requires peacekeepers to:

• Apply the mandate consistently to all parties, including the host government.
• Document and report violations of ceasefires, human rights law, or peace agreements regardless of the perpetrator.
• Avoid actions that could be reasonably perceived as taking sides in the underlying political dispute.

The principle has been tested by robust peacekeeping and protection-of-civilians mandates. Missions like MONUSCO in the Democratic Republic of the Congo, which since 2013 has included the Force Intervention Brigade with offensive combat authority against armed groups such as the M23, raise ongoing debates about whether targeted enforcement remains compatible with impartiality. UN doctrine maintains it does, so long as action is mandate-driven rather than directed at a party's political identity.