Description:BİR OSMANLI SINIR VE İÇ GÜVENLİK TEŞKİLATI MARTOLOSLUK-AN OTTOMAN BORDER AND INTERNAL SECURITY ORGANIZATION: MARTOLOSLUK (Turks, Greeks, Serbs, Hungarians and Albanians)Martolosluk or Martolosi, in the establishment period of the Ottoman Empire It is the name given to the Christian soldiers accompanying the raiders along the border, which are used to get more news and information (espionage and intelligence). In the following years, in addition to their border guard duties, the Martolos also took on the duties of guarding the derbent and crossings of the region they were in. The decrease in wars and periods of peace also have an effect on this. In many sources, it is stated that the origin of the word martolosluk originates from the Greek armatoli, meaning mercenary. During the process we examined, it is seen that the martolos in question acted in accordance with their definitions. At first, Muslims also participated in the martolos, which consisted mostly of Wallachian, Slovenian, Bosnian, Greek Croat, Serbian and some Hungarians, in the later periods, with the conversion movements and the Turks taking place in this class. Some of these groups will form one of the elements of today's Rumeli Immigrants in later periods. Although Hungarians are also included in the organization of Martolos, it is seen that mostly Slavs and Orthodox origins take place. We think that the fact that they have different sects creates a moral ground for the parties to attack each other to a significant extent. Martolos were one of the frightening propaganda tools of the state, which weakened the enemy forces of the state, emptied the battlefields, and when the borders of the state expanded. For this reason, it is seen that some martos are in the category of insane and carry the nickname crazy. The martolos, who were assigned to the frontier, especially in the castles, pulleys and crossings, were involved in capturing, wars of attrition and castle repairs. Those whose importance decreased due to the fact that their lands remained in the inner regions over time, served to protect the mines, passages and important settlements in the inner regions. In the Martolos organization, II. The Siege of Vienna was a turning point. After this event, the long-term wars between the Ottoman Empire and the European states caused the martolos to engage in illegal activities and join banditry movements. II. A historian who studies the Ottoman-Austrian wars after Vienna will see that the martolos there were actively involved as bandits or captains on the Austrian side and as martolos in the Ottoman Empire. Christian martolos, whose abuses were seen from time to time until this period, became a part of the security problem for the Ottoman Empire by siding with A …