In this paper, the author brings a new glimpse into the UN mission known as the United Nations Peace Operation in Prevlaka (UNMOP). Although the mission itself includes a period from 1996 to 2002, the spatial and time frame will be much wider and much longer. The work was divided in period from the 15th century to the beginning of the 1990s and thereafter followed by the second divisions between 1992 and 2014 and the latest importantly validated field and subject research. As far as the spatial framework itself is concerned, the work covers the southern part of the Republic of Croatia, with reference to the waters of the Adriatic Sea and the Boko-Kotor Bay, which is conditioned by political situations in the neighboring countries: Bosnia and Herzegovina and the Federal Republic of Yugoslavia (since 2006 Republic of Serbia and Republic of Montenegro). The mandate of the UNMOP peacekeeping operation is divided into seven smaller units that are chronologically sorted and based on UN's original documents. The documents are written in English and no one has translated them into Croatian. They are available on the official UN website, but not completely. The thorough analysis of the documents gives an insight into the attitude of the UN towards Prevlaka, as well as the attitude of Croatian and Serbian authorities. Critically analyzed United Nations documents created at the time of this mission as well as the Protocol on the inter-state border between the Republic of Croatia and the Federal Republic of Yugoslavia. The paper was also accompanied by pictorial representations, mostly in the form of maps, to show the peace process and its consequences and conclusions as faithfully as possible.