[2] There is no data on the settlements in the early Iron period when an old trade route crossed the region along Wisłok River Valley.

[5] Until approximately the 15th century, the ruling classes of most cities in present-day Beskidian Piedmont consisted almost exclusively of Germans.

The line of the river Dunajec and that of the San, both in West Galicia, marked the two successive stages in the break-through battle which initiated the Austro-German offensive of 1915 on the eastern front.

An attempt to stand on the line of the Wisłok river and the Łupków Pass failed before renewed Austro-German attacks on 8 May 1915.

Wisłok Valley was one of the strategically important Carpathian rivers bitterly contested in battles on the Eastern Front of World War I during the winter of 1914–1915.

[7] Towns and townships: The main tributaries: The Pursuit and Battles at Sanok and Rzeszów (May 6–11).—After his severe defeat, Radko Dimitriev's plan was to hold the Lupków Pass with his left wing, and, supported upon this, to bring the pursuit to a stand on the line Nowotaniec–Besko-right bank of the Wislok, where there were positions favoured by the lay of the ground, and then, between the Vistula and the Wislok, on the line Wielopole-Rzeszów–Malec.

Mackensen's army was to push forward over the stretch of the Wislok between Besko and Frysztak on Mrzyglód and Tyczyn, and the Archduke Joseph Ferdinand on Rzeszów, while Boroevic was to roll up Brussilov's VIII.