The Pola flotilla (U-Flottille Pola) was an Imperial German Navy (IGN) formation set up to prosecute the U-boat campaign against Allied shipping in the Mediterranean during the First World War in support of Germany’s ally, the Austro-Hungarian Empire. It was formed in 1915 from the previously established U-Halbflottille Pola (German U-Boat Half-Flotilla, Pola). Despite its official name, it operated mainly from an advanced base at Cattaro in the Adriatic.