Auts (Catalan pronunciation: [ˈawts]) is a mountain chain that is located southeast of Mequinenza, close to the Ebro river in the Bajo Cinca comarca, Aragon, Spain.

These moderately high, dry mountains were the scenario of one of the most bloody confrontations during the Battle of the Ebro in the Spanish Civil War (1936–39).

Initially the feat of the Republican troops was hailed as a great victory by the Spanish Republic, eager to see a positive outcome of the Battle of the Ebro effort.

[4] Six decades after the events, on August 8, 1998, the "Quinta del Biberón", a group of survivors inaugurated the monument erected on the hillside of the Alto de los Auts, a key position, the highest and most strongly defended by the Republicans of the Mequinenza-Fayón battle.

After making a floral offering at the foot of the monument, the veterans recalled the thirst, heat and illness they suffered at those spaces.