Vallbona de les Monges is part of the Republican defense line L2. The L2 stretched from Seu d'Urgell to Tarragona and sought to contain the advance of the Francoist troops during the Spanish Civil War.
The construction of the L2 took place in the summer of 1938 and carried out by the prisoners of the disciplinary battalion of Vallbona, mostly military of the Francoist army of Galician origin, captured at the Battle of Teruel. They were reclining at the Monastery of Sta. Maria de Vallbona.
The surroundings of Vallbona have varied very little in the last 70 years. The crops are the same: olive trees, almond trees and vineyards, as well as the wooded area. The layout of the road is the same, and before it was used to wait for the arrival of the troops. The forests of Montesquiu are full of trenches. The trenches were built in ziga ziga to increase protection in the event of an air attack.
In the term of Vallbona you can also find niches of gunmen and artillery observatories, which you did not really have to use.
On December 19, 2010, it was inaugurated at the Sanctuary of Tallat de Rocallaura, L 2. They are 26 km indicated with more than one hundred signals that go from Vallbona de las Monges to the sanctuary of the Carving of Rocallaura, passing for 7 points of interest that illustrate bunkers, nests, rifles and trenches. This is a set of unique fortifications in Catalonia and an example of the effort to curb the advance of Franco's troops in Catalonia.