U-boat campaign
…sinking outraged US citizens already unhappy at the death of Leon C. Thrasher, drowned when U-28 sank Falaba on 28 March 1915. On 7 May 1915, the liner RMS Lusitania was torpedoed by U-20, 13 mi (21 km) off the Old Head of Kinsale, Ireland, and sank in just 18 minutes. Of the 1,960 people aboard, 1,197 were killed…