The information provided by Tunny enabled the Allies to ascertain German movements, saving thousands of lives at critical junctures such as D-Day and the Battle of Kursk in the Soviet Union. General Dwight D. Eisenhower gave the best summary after World War II. He said that "Bletchley decrypts shortened the War by at least two years". Tunny played a very important role in all of this, a war which was costing at least 10 million lives a year. A great deal of this was down to Bill Tutte.