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.

World War I in Photos: War at Sea - The Atlantic

The Sinking Of The RMS Lusitania

World War One: The war at sea - BBC Bitesize

The U-Boat: Germany's Great Gamble Of WW1 - History

RMS Lusitania, Pooh's Adventures Wiki

World War I: Naval War U boats submarines

Sinking of the RMS Lusitania - Wikipedia

The Sinking Of The Lusitania: Cover-Up, Conspiracy, Or Carelessness?

World War I: Sinking of the Lusitania