the French destroyer —while escorting the transport Whitehead to Bar—was sunk after hitting a mine. Also that month, the Austrian submarine U-12 was unsuccessfully attacked off Cape Mendra by a French submarine. Austrian destroyer shelled Montenegrin positions at Bar with Tb 15 and Tb 68F. In April, the Austrian —commanded by Lt. Georg Ritter von Trapp—chased the French armoured cruiser off Paxos, but was unable to fire any torpedoes. U-5 also torpedoed the French armoured cruiser after a two-day chase off Santa Maria di Leuca, causing 684 fatalities including Rear-Admiral Sénès. Only 137 French sailors survived. The Austrian torpedoed and damaged the British light cruiser . Also, the Austrian destroyer shelled enemy positions at Bar. Bombardment of Ancona When Italy declared war on Austria-Hungary on 23 May, the Austrian fleet was quick to act, launching several attacks on the Marche region of Italy. That day, the destroyer Dinara and Tb 53T bombarded the port of Ancona. The destroyer —on reconnaissance duty between Palagruža and Cape Gargano—shelled the semaphore and radio station at Vieste and fired upon the Italian destroyer . On 24 May, the bulk of the Austrian fleet at Pola sailed for the Italian Adriatic coast. This included the dreadnoughts Viribus Unitis, , and eight semi and pre-dreadnoughts. The fleet bombarded several cities and other targets in and around the Province of Ancona, especially damaging the port and town of Ancona itself. The destroyer shelled the Italian airship Città di Ferrara off Ancona. The semi-dreadnought and two torpedo boats bombarded Potenza Picena, then returned to Pola. The Radetzky-class semi-dreadnought , with two torpedo boats bombarded Senigallia, destroying a train and damaging a railway station and a bridge, then returned to Pola. The torpedo boat Tb 3 was unsuccessfully bombed by an Italian airship. The light cruiser shelled the Italian signal station at Cretaccio Island, while the armoured cruiser —with two torpedo boats—shelled Rimini, damaging and derailing a freight train. The destroyer shelled the signal station near Torre di Mileto. The light cruiser , a destroyer and two torpedo boats entered Corsini Channel and shelled an Italian torpedo boat station, a semaphore station, and coastal artillery batteries. The light cruiser —aided by four destroyers—sank the Italian destroyer Turbine in a pitched battle south of Pelagosa. The destroyer shelled the railway embankment near Manfredonia while the destroyer shelled the Manfredonia railway station. Finally, Austro-Hungarian flying boats dropped bombs on Venice and