After the Third Italian War of Independence Austria also fortified the new eastern border with the Veneto. From 1870 to 1873 a group of defensive works was erected at to block the route to Trento from the Brenta valley. From 1878 to 1883 the itself were expanded in what became known as the Trientiner style, using a light and economical construction method, with most guns placed in open batteries. A gun turret was built at the . Defences were also upgraded at Fort Hensel, built between 1881 and 1890, which blocked the near on the southern border of Carinthia and the Kluže Fortress further east in present-day Slovenia.