An Avro Lancaster of No. 300 Polish Bomber Squadron flying over the smoke-covered target area during a daylight attack on the oil refinery and storage depot of the Deutsche Vacuum AG at Bremen by 133 Lancasters of No. 1 Group and 6 De Havilland Mosquitos of No. 8 Group, 21 March 1945.
No. 1 Group RAF
1945-03-21
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