The purpose of this specialised thesis is to analyse the term lobbying and the lobbying profession; to analyse the history and theory of lobbying according to available literature, to analyse strategies, aims, tools and technique of lobbying and to explore the lobbying process itself. This thesis will also explore types of knowledge and skills needed for professional lobbyists. The aim is to present the Croatian Air Force and Air Defence system and to distinguish between global and civil-economic interests in Croatia’s airspace. For this thesis the process of acquiring multi-functional battle aircraft was researched, with special regard to the process of choosing the most cost-effective offer and to the lobbying activities of all actors involved. Also explored were activities of the teams of experts and advisors as well as the role of the media in this process. Also, this thesis aims to inform the public of the need of the Republic of Croatia, as a member of NATO, to have a sovereign air defence system in place. By means of semi structured, deep interviews with members of the team of experts, media representatives who were involved in the process, public support for modernising Croatia's Air Defence system was gauged as well as the role lobbying has played in this acquisition. Also analysed is the purpose of an Air Force and the ways public perception of such investments influences decision makers. Outlined herein is the lobbying process for the purchase of battle aircraft in Croatia and what Croatia is doing to gain ground on modern military powers. In addition, the thesis also explores conclusions and suggestions for promotions the Croatian Air Force and Air Defence. For the purposes of this thesis relevant literature and Internet sources were used.