Ultra Versus U-Boats: Enigma Decrypts in the National Archives

by Roy Conyers Nesbit

Keeping the Atlantic sea-lanes open was a vital factor in the fight against Nazi Germany. In the battle to protect merchant shipping from the menace of surface raiders and U-boats, Allied resolve and resources were tested to the utmost.

The story of the extraordinary measures that were taken to combat the threat, at sea and in the air, has often been told. But there is one crucial element in this prolonged campaign that has still not been fully...

• Format: Hardcover
• Language: English
• ISBN: 1844158748
• ISBN13: 9781844158744
• Release Date: April 2009
• Publisher: Pen & Sword Military
• Length: 256 Pages
• Weight: 1.95 lbs.
• Dimensions: 0.9" x 7.3" x 9.7"