Perućica forest reserve, located within the national park, was established in 1952, as “Natural reserve for scientific and educational purposes”. Perućica, which is one of the last two remaining primeval forests in Europe, is one of the five Strict Nature Reserves in Bosnia and Herzegovina. The forest has trees that are 300 years old, and the primeval forest’s vintage is stated to be 20,000 years. In some stretches the forest growth is almost impregnable.
The park is also famous as being the location of the Battle of the Sutjeska which lasted from 15 May to 16 June 1943 during World War II, where the Partisan were victorious over the German occupying forces in a battle. The Partisans were led by the Supreme Headquarters of Yugoslavia by Marshal Josip Broz Tito who foiled the enemy’s plans. Partisans were successful in breaking out of the encirclement even though they lost one third of their men.
Several large Partisan’s Memorial stone monuments commemorate this event at the northern edge of the park at on the way to primeval Perucica forest reserve.