As the Second World War raged on, Atlantic sea-routes became a crucial lifeline for Britain as merchant ships kept them supplied with critical equipment and food. But this made them an irresistible target for German attack. Speaking to Rachel Dinning for our WW2's Greatest Battles series, military historian James Holland explains why he believes the battle of the Atlantic was the most important engagement of the whole conflict, and reveals what life was really like inside a German U-boat.

James Holland is the co-founder of the Chalke History Festival - which runs from 24-30 June 2024. As a media partner of the festival, we're offering an exclusive 15% off Chalke Festival day tickets when you become a subscriber to either HistoryExtra or BBC History Magazine. Check out our spring offers and benefits at www.historyextra.com/pod

The HistoryExtra podcast is produced by the team behind BBC History Magazine.

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