9 July - Cardiff suffers its first bombing fatalities.[6]
10 July - Ten people are killed in an air raid on Swansea Docks, as shipping convoys become a target.[7]
11 July - Communist minister and poet Thomas Evan Nicholas ("Niclas y Glais") and his son are arrested and interned for "endeavouring to impede recruitment to HM Forces". Nicholas is eventually released on 20 October.[8]
11 August - Seventeen people are killed in an air raid on Manselton, Swansea.
14 August - Three German Heinkel 111s are shot down during an air-raid on Cardiff, and another over North Wales after a raid on RAF Hawarden.
22 August - A steamer, the Thorold, is sunk by German aircraft off the Skerries. Ten crew are killed.
2 September - 33 people are killed in an air raid on Swansea.
^"Hugh Hesketh Hughes". Commonwealth War Graves Commission. Retrieved 11 April 2011. Regiment/Service: Welsh Guards Date of Death: 23/05/1940 Service No: 103800 Casualty Type: Commonwealth War Dead
^‘BOWEN, Sir George Bevan’, Who Was Who, A & C Black, an imprint of Bloomsbury Publishing plc, 1920–2007; online edn, Oxford University Press, Dec 2007 accessed 30 Nov 2013
^Obituaries (Obituaries) The Times Friday, Jul 05, 1940; pg. 7; Issue 48660; col E