In Brod, Austria at the time 1715th to 1780th build large imperial and royal border Fortress of Brod on the Sava river, which was conceived by Prince Eugene of Savoy. According to one estimate Brod Fortress resistance, in the case of classical siege with full channel the enemy would have taken ten days of preparation for the attack and 46 days to take over the entire fortress. Although as a military fort on the frontier fortress has never been able to prove and demonstrate its combat power of the bygone times of everyday military life that it took place reminiscent of many preserved fortifications. Fort boat was built by Vauban system. It's basically a square, a system of defensive trenches gives her star-like layout.