World War One Diary for Sunday, April 8, 1917:
Austria: Government severs relations with US (Bulgaria on April 10).
Eastern Atlantic – The Torrington Massacre: U-55 (Werner) sinks British steamer off Scilly Islands, destroys one lifeboat (14 killed) and drowns 20 passengers by deliberately submerging while they are on outer casing.
Macedonia: KG 1 bombs Yanesh railhead; 2 Sopwiths force down an already AA-riddled Friedrichshafen G-type bomber, 3 crew taken PoW.
Western Front: Lieutenant-General Hoeppner and Chief of Staff Lieutenant-Colonel Thomsen both awarded Pour le Merite for reorganizing German Army Air Service since November 12, 1916.