Raids on Hamburg during Second World War Date Target/Type Roundel and notes night of 10/11 September 1939 leaflets 10 RAF aircraft.[16] night 17/18 May 1940 oil installations 48 Hampdens attacked Hamburg oil installations.[17] night 27/28 May 1940 oil refineries Hampdens attacked oil refineries near Hamburg.[17] night 30/31 May1940 oil refineries Hamburg oil refineries were bombed.[17] June–October 1940 Hamburg, Wilhelmshafen and Münster were frequent targets during the Battle of Britain (June–October 1940) but lack of bombing accuracy meant that little damage was done,[18] (See Butt Report (August 1941)). night 20/21 October 1940 Hamburg bombed by Wellingtons which started 12 fires with little loss of life.[18] night 24/25 October 1940 Hamburg bombed by Wellingtons which started 13 fires with little loss of life.[18] nights of 15/16 November and 16/17 November 1940 over 200 aircraft.