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20 May 1917

By May 20, 2017No Comments
  • British troops on the Western Front gain territory near Fontaine-lez-Croisilles, as Germany gains 200 metres north-east of Cerny
  • Italian soldiers on the Southern Front repulse an Austrian attack on Carso
  • A RNAS seaplane commanded by Australian Flight Sub-Lieutenant Charles Reginald Morrish sinks German submarine U-36 in the North Sea, marking the first sinking of a submarine by an aircraft