Washington, D.C. · October 17, 1941 Starting on September 1, 1941, two years into the Battle of the Atlantic, U.S. warships began escorting convoys of Britain-bound merchantmen from the North American coast. Convoys departed from Newfoundland off the coast of Canada and ended in the mid-Atlantic at Iceland. Four days after initiating the escort service,…
Washington, D.C. · September 11, 1941 Starting on September 1, 1941, two years into the Battle of the Atlantic, U.S. warships began escorting convoys of eastbound merchantmen from the North American coast. Convoys departed from Newfoundland, Canada, and ended in the mid-Atlantic at Iceland, the halfway point to ports in the British Isles. Four days after…
U.S. Seventh Fleet HQ · July 30, 1943 During the Pacific War U.S. submarines fired some 11,000 torpedoes, sinking hundreds of Japanese warships and well over one thousand merchant ships. The number of lives lost in the latter engagements is estimated at 116,000 Japanese merchant seamen, with 70,000 casualties the result of U.S. submarine actions. In mid-March 1942…
Off the Normandy Coast, Occupied France · May 29, 1944 The German Kriegsmarine possessed several notable midget submarines (Kleinst-U-Boote), one being the one-man Biber (German for “beaver”) and the other the two-man Seehund (German for “seal”). Neither U‑boot was particularly successful as a weapon against Allied supply and troop ships. Influenced by a captured one-man…
Berlin, Germany · May 24, 1943 In June 1942 German submarines sank 637,000 tons of British shipping—a greater total than in any previous or subsequent month. So many prowling U‑boats made it hard for merchant convoys sailing in the major trans-Atlantic traffic lanes to evade detection. The next year, in March, Atlantic U‑boats sank 82 ships (476,000 tons)…
Reykjavik, Iceland · May 17, 1941 On April 9, 1940, Nazi Germany invaded Denmark and Norway, ostensibly to protect the neutrality of the two Scandinavian countries against Franco-British aggression. Adolf Hitler had become convinced in mid-December 1939 that the two West European Allies, at war with Germany for three and a half months now, were…
Aboard the HMS Walker in the North Atlantic · March 17, 1941 On this date in 1941 U-99, skippered by Otto Kretschmer, one of Germany’s most famous U‑boat commanders, had just fired the last of her torpedoes when she was spotted by a British destroyer southeast of Iceland. By this time Kretschmer, on his eighth…
Aboard the USS Pollack in Pacific Ocean · March 11, 1942 On this date in 1942 the USS Pollack made the first submarine attack using only its deck guns. Its targets were two Japanese fishing boats. During 1942 U.S. submarines reported 34 gun attacks on sampans and trawlers. The number of attacks increased to 64 in…
Santa Barbara, California · February 23, 1942 Japanese submarines initiated the first shore bombardments of the war with an attack on the U.S. Navy base at Johnston Island in the Pacific in mid-December 1941, just days after Japanese carrier-based planes had destroyed, in their surprise attack on Pearl Harbor, Hawaii, one‑half of the United States’…
Berlin, Germany · January 18, 1944 On this date in 1944 Grand Admiral Karl Doenitz approached his commander in chief, Adolf Hitler, with a design for a new midget submarine, much larger than the one‑man Biber (Beaver) sub that was in the prototype stage. The Hecht (Pike) was a three‑man midget based on a British…