Understanding how the army, one of Ottoman Empire’s main dynamics and whose number reached over hundreds of thousands on occasions, was organized and how its needs were taken care of is not only important in better understanding the founding and the rising of the state but also important in better understanding the reasons for its downfall. Because just like other states founded throughout history, the political history and development of the Ottoman State has been shaped in connection to its military operations. The success of the military operations is dependent on logistics activities, the preparations and organizations before the military campaign. Indeed, when the Ottoman State decided to go in to war, it has made important preparations in elevating the administrative and logistical organization in the country to a more effective level. These preparations before military campaigns and strategies implemented called today as logistics have led to the success of the military campaigns carried out in the Ottoman State. At this point, the preparations implemented before the campaigns play a big role in the growth of the state and expansion of the boundaries of the empire. So the key element that won or lost the wars for the Ottoman State throughout history was the far better prewar preparations and organizations they applied much more successfully than their contemporaries. Knowing how and in what ways these preparations were implemented in the Ottoman State will broaden our perspective and help us better understand the underlying causes in Ottoman victories. This study has been prepared in accordance with these goals and objectives. In this study, it is intended to put forth how the Ottomans did their preparations before and during the war and to give a different perspective to the current knowledge and experience in the light of new resources.