The Volturno Line (also known as the Viktor Line; German: Volturno-Linie, Viktor-Linie, Italian: Linea del Volturno) was a German defensive position in Italy during the Italian Campaign of World War II.
The line ran from Termoli in the east, along the Biferno River through the Apennine Mountains to the Volturno River in the west.
Following the Allied invasion of Italy in September 1943 the German forces set up a series of defensive lines across Italy, intended to delay the Allied advance. The Volturno Line was the southernmost of these.