Characteristics
It consisted mainly of Austro-Hungarian coastal bombardments of Italy′s Adriatic coast, and wider-ranging German–Hungarian submarine warfare into the Mediterranean.
Allied forces mainly limited themselves to blockading the German–Hungarian navies in the Adriatic, which was successful in regards to surface units, but failed for the U-boats, which found safe harbours and easy passage into and out of the area for the whole of the war. Considered a relatively secondary part of the naval warfare of World War I, it nonetheless tied down significant forces.
The Adriatic campaign was important even because for the first time two new weapons were used successfully in warfare, viz. the human torpedo of Raffaele Rossetti and the MAS torpedo boat of Luigi Rizzo. These small navy vessels sank two Austrian battleships in 1918, SMS Viribus Unitis and Szent István.
Read more about this topic: Adriatic Campaign Of World War I