7 May 1917
- British Major Edward "Mick" Mannock RFC (who had been posted to No. 40 Squadron in France on 1 Apr), later the top scoring British Empire ace of the war with 73 kills, claimed his first aerial victory with the destruction of a balloon. ww2dbase [AC]
- British Captain Albert Ball VC, DFC & 2 Bars & MC, RFC (43 kills and one balloon) was killed when, in his SE.5a aircraft, he dived into cloud in pursuit of a German aircraft over Lens, France. He was buried by the Germans with full Military honours. ww2dbase [Lens, Nord-Pas-de-Calais | AC]
- The keel of Tenryu was laid down at the Yokosuka Naval Arsenal, Japan. ww2dbase [Yokosuka Naval Arsenal | Tenryu | Yokosuka, Kanagawa | CPC]
7 May 1917 Interactive Map
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