The Frontline develops an artistic investigation into the map of the frontline of the Ebro Battle, the bloodiest of the Spanish Civil War. The cartographic sign represents a natural frontline that coincides with the lower course of the Ebro River in Catalonia. The artistic investigation explores the expressive possibilities of gesture and line as a seismographic movement or the flash of lightning. The Ebro Battle, the longest and most decisivmovemente battle in the Spanish Civil War, lasted for four months during which the military superiority of the rebel army finally won with the support of the German and Italian air forces, determining the final outcome against the Republican troops. Historical knowledge and artistic investigation become ethical and political reflection: this line on the map becomes a crack, a cut and a suture, visual metaphors of the division, confrontation and violence between human beings.