Did German U-boats conduct a ‘clean’ campaign during the Second World War? Or were they guilty of routinely murdering survivors in the water? In this Long Read, written by Roger Moorhouse, we weigh up the evidence.

HistoryExtra Long Reads brings you the best articles from BBC History Magazine, direct to your ears. Today’s feature originally appeared in the November 2025 issue, and has been voiced in partnership with the RNIB.

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