When researching about gendarmerie of the NDH, independent contributions about the gendarmerie itself are rare, but they are mentioned in a number of books and professional articles that I myself used when writing the paper. Most of the sources on the police are in the Croatian State Archives, which I personally could not use, but I used the sources compiled on the basis of sources from the Archives. The problem with the availability of sources about the NDH police force is that many documents were destroyed, especially when the partisans came to power. Also, some of the sources are located in the Republic of Serbia, which are difficult to access, because access to such documents requires permits, which are difficult to access due to the political situation. The aim of this paper is to present to the reader the entire organization, operation and origin of the gendarmerie in the Independent State of Croatia. The organization of the police force itself is elaborated in detail, especially their relationship with external and internal collaborators. Also, one of the goals of the work is to convey to the reader that a gunman is not the same as a member of the Ustasha movement. Gendarmerie created a favorable situation, while members of the Ustasha movement wrote one of the blackest parts of Croatian history.