Trincerone (Fort) of Grigno

In 1866 the borders between the Austro-Hungarian Empire and Italy’s Reign were set by the location Martincelli, between the  towns of Grigno (Trentino) and Cismon del Grappa (Veneto). 
When WWI started, Valsugana found itself being the eastern most subsector of the Trentino frontline.

The only defesive structures of the area were Fort Tenna and Fort Colle delle Benne, near Levico Terme, which were built in the previous century and weren’t able to counter-act the “modern” artillery of the new War.

As soon as Italy declared war, the Austro-Hungarian troops  retreated to their positions and Grigno immediately became a part of Italy.

So the Italians were the ones to create a new defensive line that the Austro-Hungarians hadn’t been able to organise: more field fortification lines, the most important of which were on Mount Lefre and on the Altipiano dei 7 Comuni, with outposts equipped with machine guns to protect the trenches in the valley beneath. 

One of these was the barrage of Grigno which consisted in two groups: a first line in the open air (with wood reinforcements and bags full of sand) and a second line embodied by the “trincerone”, which was never hit during the conflict, but was conquered by the Austro-Hungarians after the Defeat of Caporetto.


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