A forest fire is any uncontrolled, spontaneous movement of fire on a forest surface. These are open space fires which, due to the area they cover and the speed of spread, very often require the intervention of a large number of firefighters, techniques and equipment. Due to the regular occurrence of large forest fires, in the summer months, mostly along the Adriatic coast, civilian organizations sought the help of the Croatian Armed Forces in extinguishing large forest fires. For several years after the Homeland War, the Croatian Armed Forces formed a "Task forces" consisting of members of all branches of the CAF. The CAF forces thus formed have been a key component of the forces for the fight against large forest fires in the Republic of Croatia for many years. Improving the system of extinguishing large forest fires in the period from 2002 to 2004, the Republic of Croatia managed to establish one of the most organized models of extinguishing fires in this part of Europe. In the first part of this paper we will see the location and characteristics of the Republic of Croatia as well as the definition of large forest fires. In the second part of the paper, we will analyze the legal regulations for firefighting and in the continuation of the paper we will chronologically define the place, role and tasks of the Armed Forces in the system itself. large forest fires, homeland security system, Croatian Firefighting Association, Croatian Armed Forces, firefighting season