In February 1917, German U-boats launched a savage unrestricted campaign against both Allied and neutral shipping. At its peak in April, 860,000 tons of Allied

In February 1917, German U-boats launched a savage unrestricted campaign against both Allied and neutral shipping. At its peak in April, 860,000 tons of Allied

In February 1917, German U-boats launched a savage unrestricted campaign against both Allied and neutral shipping. At its peak in April, 860,000 tons of Allied

"In Defeating the U-boat: Inventing Antisubmarine Warfare, Newport Paper 36, Jan. S. Breemer tells the story of the British response to the German submarine thr

The Q-ship, an ordinary merchant vessel with concealed guns, came into its own during the First World War, when the Royal Navy to trap and destroy German U-boat