U-Boats and the Lusitania: The War at Sea

In World War I, Germany deployed U-boats in an attempt to stifle the flow of essential supplies to Britain and other Allied nations, without success.

Sinking of the RMS Lusitania - Wikipedia

The First World War at Sea – Part Two

RMS Lusitania - Historic UK

The Hunt for the Notorious U-Boat UB-29, History

U-Boats and the Lusitania: The War at Sea

Unrestricted U-boat Warfare National WWI Museum and Memorial

What Sunk the Lusitania? If you Think it was a Torpedo, Think

The story of the Submarine that sank Lusitania!! (U-20) (Complete

The Sinking of Lusitania – A Shock to the World - History Chronicles

Was the Lusitania a Legitimate Military Target?