The United Nations peacekeeping force is a special cross-border force established in accordance with relevant United Nations resolutions. 1956 was established during the Suez crisis. It is appointed by the United Nations General Assembly or the Security Council and is active in areas with international conflicts. Soldiers of peacekeeping forces wear sky-blue helmets or blue berets with the abbreviation of "UN" on them, and the armbands are decorated with the pattern of "Earth and Olive Branch". Anyone who has participated in the United Nations peacekeeping forces must be sent to the training centers of the four Nordic countries for special training, so as to be familiar with the functions, objectives, tasks and special military training of the peacekeeping forces. Different from the special forces of other countries, United Nations peacekeeping forces must make their presence public and March in the most conspicuous public places such as roads, squares and busy areas.