The main purpose of this final thesis is to become familiar with the situation that libraries or librarians have gotten into during the War of Independence. It shows how librarians acted with library materials in order to preserve them during war times. Moreover, the purpose of this work is to analyse regulations that are related to the preservation of material in case of an armed attack. This topic is of main importance because it enables research of libraries who have endured the attacks, activity of the libraries in Zadar during the War of Independence and the approach of the librarians to library materials and their patrons. This paper will help to identify the ways of preserving library materials and how much meaning the books really had to patrons during the attacks. Librarians put an effort into providing as many patrons as they could with books they wanted and they continued to work regardless the war circumstances. In such exceptional circumstances the crucial thing is to know prescribed procedures for business in this case procedures about how to act in case of armed conflict. Theory of this paper will be about activities of the libraries located in Zadar during the War of Independence. The focus is on the destruction of libraries, activity of the librarians, and work with patrons, preservation of the library material and some issues that can occur while preserving the material in cultural institutions in armed conflict circumstances. The last part of the study shows analysis of laws and other documentation in librarianship in Croatia where the subject is operation of the library and preservation of the library material in case of armed conflicts.