On the morning of 26 September 1944, German troops from SS-Pionier-Bataillon 16 and Grenadier-Regiment 105, led by soldiers from the Italian National Republican Guard (GNR), carried out a large-scale round-up in the Suviana area.

The operation set out from Poggio Barone and first reached the village of Cisola, where the soldiers burst into the home of Cirillo Masotti, a partisan of the Toni Matteotti Montagna Brigade, and captured him. The column then reached Capanna dei Moratti, where it split up: one group remained there, whilst the rest, with the prisoner, continued towards Ca’ Gardini.

The soldiers who had stopped at Capanna dei Moratti threw a hand grenade into the Tanarin farmhouse, which caught fire. Two SS men and a GNR soldier then broke down the door of the Guidotti family home, but found only Marchione Guidotti, the wife, with her sick son, Giuliano. After searching the building, they left. Meanwhile the husband, Giovanni Battista Guidotti, was working in the fields with his sons Gino and Silvio and other local farmers. When the German soldiers arrived, everyone fled in search of shelter. Giovanni Battista managed to escape, but his sons were captured.

The two groups of German soldiers reunited, and the three prisoners were taken to the village of Molinello, then to the area near the Suviana reservoir dam, behind the current football pitch wall, where they were shot.

That same morning, around 11:00 to 11:30, the Suviana reservoir dam (which had been mined a few days earlier) was blown up by SS engineers, who had done the same to the Pavana dam three days prior. On the same day, the bridge over the River Reno at Ponte della Venturina was also blown up; it had already been bombed by the Allies on 18 April 1944 and immediately repaired at the time. The farmer Luigi Arienti, who had taken refuge in the woods near Poggi, was curious about the explosion and came out to see what was happening. He stumbled upon an SS patrol, who killed him on the spot.

In Suviana, a memorial plaque commemorates the three fallen partisans.