The United Nations, or UN, is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace.
The UN has long supported the Sanctuary Network's work with Abnormals. However, shortly after the Big Bertha crisis and the discovery of Hollow Earth, they dispatched security inspector Lilian Lee to the main facility in Old City to evaluate Helen Magnus' work.
During the crisis surrounding the discovery of Hollow Earth, more and more people within the UN began to question the Sanctuary Network's competence, and eventually decided to let the Lotus Defense Corps handle it. This did, however, prove to be an unwise decision.