The U-Boat commander who almost killed Churchill

Churchill's life was saved that day when the torpedo that struck his ship failed to detonate

Otto Kretschmer - Wikipedia

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Churchill canvasses at Hilliard Museum paint more complete picture of complex man

Wilhelm Zahn - Wikipedia

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Interview: Erik Larson, Author Of 'Dead Wake: The Last Crossing Of The Lusitania' : NPR

The submarine U-505 made an epic journey from Germany to Chicago

U-boat - Wikiwand

How a Young Winston Churchill Survived Ambushes and Firefights

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Was Winston Churchill responsible for Lusitania's sinking?

The Heroic Death of the HMS Jervis Bay - Warfare History Network