Srač, popularly called Strač, belongs to the last generation of concrete-armored fortresses built before the First World War. The change in construction was due to a new generation of artillery that demolished the thick stone walls of the fortresses. Expensive and huge, they were a strategic support in the war and could receive a large army. In some places, the reinforced concrete walls on Strač are several meters thick. Strač is surrounded by a throat (4) (trench) and barbed wire (6). Together with the Dvrsnik fortress in Montenegro, it is considered a masterpiece of military engineering of that time. 

More money from the Vienna state treasury was spent on the construction of a three-belt protection system in Herzegovina than was spent on the construction of public institutions. It relied on the system in Boka, which was built to protect the military port of the empire and to defend the sensitive mountain border with the Kingdom of Montenegro. At that time in Europe, it was one of the largest and most modern defensive systems. According to the detailed planning, precise use of the terrain, the way of connecting and covering the terrain with artillery fire, it was the fruit of a military-engineering genius. Is it superfluous to say that the integral system welcomed the capitulation of Austria-Hungary without being used during the war?