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Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning. The use of unrestricted submarine warfare has had significant impacts on international relations in regards to both the First World War and the Second World War .
List of U-boat flotillas contains lists of the German U-boat flotillas in the two World Wars. The bases shown here are the ones at which the flotillas spent most of their career. During World War II, submarine flotillas were often tactically deployed, in contrast to the surface flotillas of the Kriegsmarine which were mainly administrative.
An unrestricted line officer (shortened to URL officer) is a designator given to a commissioned officer of the line in the United States Navy, who is eligible for command at sea of the navy's warfighting combatant units such as warships, submarines, aviation squadrons and SEAL teams.
On 31 January 1917, it was announced to the German Reichstag that unrestricted submarine warfare would resume the next day, 1 February. [1] The renewed U-boat campaign was initially a great success; nearly 500,000 tons of shipping being sunk in both February and March, and 860,000 tons in April, when Britain's reserve of wheat fell to 6 weeks ...
The British established a naval blockade of Germany on the outbreak of war in August 1914, issuing a comprehensive list of contraband that grew to include even foodstuffs, and in early November 1914 Britain declared the North Sea to be a "military area", with any ships entering the North Sea doing so at their own risk unless they obeyed specific Royal Navy instructions.
RMS Lusitania (named after the Roman province corresponding to modern Portugal and portions of western Spain) was a British ocean liner launched by the Cunard Line in 1906. She was the world's largest passenger ship until the completion of her sister Mauretania three months later and was awarded the Blue Riband appellation for the fastest Atlantic crossing in 1908.
The sudden loss of contact roughly 105 minutes after the Titan departed for the famed wreck site was an ominous sign, experts say
The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies, largely in the seas around the British Isles and in the Mediterranean, as part of a mutual blockade between the German Empire and the United Kingdom.