Britain appeared doomed until the German naval codes were cracked.

Karl Dönitz

The Codebreakers’ War in the Atlantic

By Gene J. Pfeffer

The Battle of the Atlantic was a life-and-death struggle between the German Kriegsmarine and the Allied navies that was fought for control of Britain’s lifeline to its empire and to the United States. Read more

In this photo published in Signal magazine in August 1943, Albert Speer is shown at the wheel of a prototype tank.

Karl Dönitz

Albert Speer: Chief Architect of the Third Reich

By Blaine Taylor

On October 6, 1943, Dr. Albert Speer, Reich minister of armaments and war production for the Third Reich, gave a 50-minute address to the assembled top officials of Nazi Germany at Posen Castle in occupied Poland’s Reich Gau (Region) of Wartheland on the critical state of World War II at that point. Read more

Crewmen aboard the U.S. Coast Guard Cutter Spencer watch the waters of the Atlantic Ocean brew up with the detonation of a depth charge. This photograph was taken while the Spencer was defending a trans-Atlantic convoy, visible in the background, against a German U-boat attack.

Karl Dönitz

Max Horton: Leading the Charge Against the U-Boats

By Michael D. Hull

British Prime Minister Winston Churchill, who rode in a cavalry charge in the Sudan in 1898, escaped from the Boers in 1899 and served for six months as a troop leader in the Western Front trenches in 1915-1916, remarked during World War II, “The only thing that ever really frightened me during the war was the U-boat peril.” Read more

The Allies and the Axis sought to control the highly valued Azores, but both had to contend with the noninvolvement of Portugal during WW2.

Karl Dönitz

Portugal during WW2: Covering the Azores Gap

By Norman Herz

The year 1944 dawned with America already at war for over two years. In an event not marked by history books, the 96th Navy Construction Battalion, Seabees, crossed the Atlantic from Davisville, Rhode Island, on the Abraham Lincoln, a converted banana boat escorted by two destroyers, the USS Ellis and USS Biddle. Read more

Karl Dönitz

Undeclared War in the Atlantic

By James I. Marino

Between September 1939 and December 1941, the United States moved from neutral to active belligerent in an undeclared naval war against Nazi Germany. Read more