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German U-boats attempted to cut the supply lines between North America and Britain. The nature of submarine warfare meant that attacks often came without warning, giving the crews of the merchant ships little hope of survival. The United States launched a protest, and Germany changed its rules of engagement. After the sinking of the passenger ship RMS Lusitania in 1915, Germany promised not to target passenger liners, while Britain armed its merchant ships, placing them beyond the protection of the "cruiser rules", which demanded warning and movement of crews to "a place of safety&quot: (a standard that lifeboats did not meet). Finally, in early 1917, Germany adopted a policy of unrestricted submarine warfare, realising that the Americans would eventually enter the war. Germany sought to strangle Allied sea lanes before the United States could transport a large army overseas, but could maintain only five long-range U-boats on station, to limited effect. The U-boat threat lessened in 1917, when merchant ships began travelling in convoys, escorted by destroyers. This tactic made it difficult for U-boats to find targets, which significantly lessened losses; after the hydrophone and depth charges were introduced, accompanying destroyers could attack a submerged submarine with some hope of success. Convoys slowed the flow of supplies, since ships had to wait as convoys were assembled. The solution to the delays was an extensive program of building new freighters. Troopships were too fast for the submarines and did not travel the North Atlantic in convoys.The U-boats had sunk more than 5,000 Allied ships, at a cost of 199 submarines. World War I also saw the first use of aircraft carriers in combat, with HMS Furious launching Sopwith Camels in a successful raid against the Zeppelin hangars at Tondern in July 1918, as well as blimps for antisubmarine patrol.


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ドイツ軍のUボートは、北米・英国間の供給ラインを切断しようと企んだ。海底戦争の性質は、しばしば警告なしで攻撃が来ることを意味するので、商船の乗組員にほとんど生き残りの希望を与えなかった。アメリカ合衆国が抗議を開始したので、ドイツは交戦規則を変更した。1915年に英国RMS(英国郵船)の客船ルシタニア号が沈められた後、ドイツ軍は旅客定期便は標的にしないと約束し、他方英国は商船を武装して「巡洋艦規則」の保護海域外に出た。その規則には(条件があって)、警告と乗員の「安全海域」への移動を要求するものであった。 (しかし)最終的にドイツ軍は、1917年前半に無制限の海底戦争の方針を採用したことで、結局、アメリカ人の参戦が現実のものとなった。ドイツ軍は、アメリカ合衆国が大軍を大洋上に輸送できる前に連合国軍の航路を抑えつけようと画策したが、わずか5隻のUボートを所定海域に長期駐留できただけで、影響は限定的であった。商船が、駆逐艦による護衛を受けて、輸送船団を組んで航海し始めた1917年に、Uボートの脅威は減少した。この戦術は、Uボートが標的を捜し出すことを困難にして、損失をかなり少なくした。水中聴音器と爆雷が導入されたあと、随行する駆逐艦が若干の成功の望みをもって水中の潜水艦を攻撃することができるようになった。 輸送船団が集まるまで、船が(出航を)待たなければならなくなった時から、輸送隊による必需品の流れが遅れることになった。遅れの解決策は、新しい貨物船を建造する広範な計画であった。兵員輸送船は、潜水艦にとってはあまりに速くて(攻撃できないので)、北大西洋上でも輸送船団を組んで航行しなかった(その必要がなかった)。Uボートは、199隻の潜水艦の費用で5,000隻以上の連合国の船舶を撃沈した。第一次世界大戦ではまた、戦闘用の航空母艦の最初の使用が見られた。すなわち「怒涛のHMS(英国軍艦)」が、対潜水艦パトロールのための気球だけでなく、それと同じようにソプウィス・キャメル機の発進によって、1918年7月にトンデルンのツェッペリン格納庫に対する襲撃を行って、成功を収めたのである。





  • 日本語訳をお願いします。

    Allied countermeasures during this period had mixed success. Defensive measures, such as arming merchant ships, and advising them to either run, or turn towards the U-boat in order to ram, or force it to submerge, were the most effective. From arming ships for self-defence, the next step was arming ships for the purpose of engaging the U-boats in gun battles; 2 U-boats were sunk in 1915 whilst attacking trawlers so fitted. The following step was to arm and man ships with hidden guns to do so, the so-called Q ship. A variant on the idea was to equip small vessels with a submarine escort. In 1915 2 U-boats were sunk by Q-ships, and 2 more by submarines accompanying trawlers.

  • 日本語訳して下さい 。

    The German U-boat force was now primarily based at Ostend in Belgium, giving the submarines better access to the sea lanes around England. The Germans made use of this advantage, sending out about 20 U-boats to begin the naval blockade. In January, before the declaration of “unrestricted submarine warfare” as the submarine blockade was called, 43,550 tonnes of shipping had been sunk by U-boats. The number of sinkings then steadily increased, with 168,200 tonnes going down in August. Attacking without warning, German U-Boats sank nearly 100,000 GRT per month, an average of 1.9 ships daily.

  • 日本語訳をお願いいたします。

    The Atlantic U-boat campaign of World War I (sometimes called the "first battle of the Atlantic", in reference to the World War II campaign of that name) was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France. Initially the U-boat campaign was directed against the British Grand Fleet. Later U-boat fleet action was extended to include action against the trade routes of the Allied powers. This campaign was highly destructive, and resulted in the loss of nearly half of Britain's merchant marine fleet during the course of the war. To counter the German submarines, the Allies moved shipping into convoys guarded by destroyers, blockades such as the Dover Barrage and minefields were laid, and aircraft patrols monitored the U-boat bases.

  • 英文を日本語訳して下さい。

    Surprised, outnumbered and outgunned, three German light cruisers and one destroyer were sunk, three light cruisers were damaged, 712 sailors killed, 530 injured and 336 taken prisoner. The British only suffered casualties of 35 killed and 40 wounded, one light cruiser and three destroyers damaged. Despite the inequality of the fight, the battle was regarded as a great victory in Britain, where the returning ships were met by cheering crowds. Beatty was vaunted as a hero, although he had taken little part in the action or planning of the raid, which was led by Commodore Tyrwhitt and conceived by him and Keyes, who had persuaded the Admiralty to adopt it. The raid might have led to disaster had the additional forces under Beatty not been sent by Admiral John Jellicoe at the last minute. The German government and the Kaiser in particular, restricted the freedom of action of the German fleet, instructing it to avoid any contact with superior forces for several months thereafter. The battle took place less than a month after the British declaration of war against Germany on 5 August 1914. The war on land went badly for the French and their allies at the Battle of the Frontiers, the German invasion of France. British naval tactics had typically involved a close blockade of ports and this had been the British plan for war against Germany up to 1913. The Admiralty had realised that the advent of submarines armed with torpedoes and mines meant that operations involving capital ships near an opponent's ports would place them at great risk of surprise attack. Ships would be obliged to keep moving and return to port every few days to refuel. The German navy had expected that Britain would adopt its traditional approach and had invested in submarines and coast defences. The main body of the German navy—the High Seas Fleet (HSF)—was smaller than the British Grand Fleet stationed around home waters and could not expect victory in a fleet engagement. The HSF adopted a strategy of waiting in defended home ports for opportunities to attack the larger British force. The British adopted a strategy of distant blockade, patrolling the North Sea rather than waters close to Germany. If German ships sailed, they must either pass the 20 mi (17 nmi; 32 km)-wide Straits of Dover, defended by British submarines and mine barrages or the North Sea, where the Home Fleet was stationed at Scapa Flow in Orkney, defending the 200 mi (170 nmi; 320 km)-wide narrow point between Britain and Norway. The German ships were contained in an area where they could not attack Allied merchant shipping; to keep the HSF in harbour, the British made occasional forays with the Grand Fleet and patrolled with smaller cruiser and battlecruiser squadrons.

  • 英文を日本語訳して下さい。

    By early 1915 a new threat began to materialise: submarines. At first they were used by the Germans only to attack naval vessels, something they achieved only occasionally but sometimes with spectacular success. Then the U-boats began to attack merchant vessels at times, although almost always in accordance with the old Cruiser Rules. Desperate to gain an advantage on the Atlantic, the German government decided to step up their submarine campaign, as a result of the British declaring the North Sea a war zone in November 1914. On 4 February 1915, Germany declared the seas around the British Isles a war zone: from 18 February Allied ships in the area would be sunk without warning. This was not wholly unrestricted submarine warfare as efforts would be taken to avoid sinking neutral ships. Lusitania was scheduled to arrive in Liverpool on 6 March 1915. The Admiralty issued her specific instructions on how to avoid submarines. Admiral Henry Oliver ordered HMS Louis and HMS Laverock to escort Lusitania, and took the further precaution of sending the Q-ship HMS Lyons to patrol Liverpool Bay. The destroyer commander attempted to discover the whereabouts of Lusitania by telephoning Cunard, who refused to give out any information and referred him to the Admiralty. At sea, the ships contacted Lusitania by radio but did not have the codes used to communicate with merchant ships. Captain Dow of Lusitania refused to give his own position except in code, and since he was, in any case, some distance from the positions they gave, continued to Liverpool unescorted. In response to this new submarine threat, some alterations were made to the ship's protocols. In contravention to the Cruiser Rules she was ordered not to fly any flags in the war zone. Some messages were sent to the ship's commander to help him decide how to best protect his ship against the new threat, and it also seems that her funnels were most likely painted dark grey to help make her less visible to enemy submarines. Clearly, there was no hope of disguising her identity, as her profile was so well known, and no attempt was made to paint out the ship's name at the bow. Captain Dow, apparently suffering from stress from operating his ship in the war zone, and after a significant "false flag" controversy, left the ship; Cunard later explained that he was "tired and really ill". He was replaced by Captain William Thomas Turner, who had previously commanded Lusitania, Mauretania, and Aquitania in the years before the war.

  • 日本語訳をお願いします。

    The first attacks on merchant ships had started in October 1914. At that time there was no plan for a concerted U-boat offensive against Allied trade. It was recognized the U-boat had several drawbacks as a commerce raider, and such a campaign risked alienating neutral opinion. In the six months to the opening of the commerce war in February 1915, U-boats had sunk 19 ships, totalling 43,000 GRT.

  • 英文を日本語訳して下さい。

    The Germans had assumed that their cruisers, leaving port one by one, would not meet larger ships or a superior force and failed to keep their ships together so they might have better odds in any engagement. Beatty—when faced with the choice of leaving one of his ships to finish off disabled enemies—had elected to keep his squadron together and only later return in force to finish off the ships. Goodenough managed to lose track of two cruisers, which played no further part in the battle. German light cruisers armed with larger numbers of faster firing 10.5 cm (4.1 in) guns, proved inferior to similar British cruisers with fewer but more powerful 6 in (150 mm) guns. The German ships proved difficult to sink despite severe damage and impressed the British with the quality of their firing. British and German sources reported the determination and bravery of the defeated German ships when overwhelmed. No one reported the presence of British cruisers to Admiral Hipper until 14:35. Had he known, he could have brought his battlecruisers to sea faster and consolidated his fleet, possibly preventing German losses and instead inflicting some on the departing British ships. The British operation took longer than anticipated so that the large German ships would have had sufficient high water to join the battle. The British side suffered from poor communication, with ships failing to report engagement with the enemy to each other. The initial failure to include Jellicoe in planning the raid could have led to disaster, had he not sent reinforcements and the communication failures meant British ships were unaware of the new arrivals and could have attacked them. There was no way to warn off British submarines which might have targeted their own ships. It had been the decision of Admiral Sturdee—Admiralty Chief of Staff—not to inform Jellicoe and also not to send additional larger ships which had originally been requested by Keyes. Jellicoe had countermanded this decision once he knew of the raid, by sending ships which were part of his command. Keyes was disappointed that the opportunity for a greater success had been lost by not including the additional cruisers properly into the plan as he had originally intended. Jellicoe was disturbed by the Admiralty failure to discuss the raid with their commander in chief of the Home Fleet at sea. The Germans appreciated that standing patrols by destroyers wasted time and resources, leaving them open to attack. The Germans sowed defensive minefields to prevent enemy ships approaching and freed the destroyers to escort larger ships, which were never to be sent out one by one. The British realised it was foolish to have sent Arethusa into battle with inadequate training and jammed guns.

  • 英文を日本語訳して下さい。

    The German Admiralty also decided that the Type UB II submarine would be ideal for Mediterranean service. Since these were too large to be shipped in sections by rail to Pola like the Type UB I, the materials for their construction and German workers to assemble them were sent instead. This meant a shortage of workers to complete U-boats for service in home waters, but it seemed justified by the successes in the Mediterranean in November, when 44 ships were sunk, for a total of 155,882 tons. The total in December fell to 17 ships (73,741 tons) which was still over half the total tonnage sunk in all theaters of operation at the time.

  • 以下の英文を訳して下さい。

    Another option was arming ships for self-defence, which, according to the Germans, put them outside the protection of the cruiser rules. Another option was to arm and man decoy ships with hidden guns, the so-called Q-ship. A variant on the idea was to equip small vessels with a submarine escort. In 1915, three U-boats were sunk by Q-ships, and two more by submarines accompanying trawlers. In June also U-40 was sunk by HMS C24 while attacking Taranaki, and in July U-23 was sunk by C-27 attacking Princess Louise. Also in July U-36 was sunk by the Q-ship Prince Charles, and in August and September U-27 and U-41 were sunk by Baralong, the former in the notorious Baralong Incident. There were, however, no means to detect submerged U-boats, and attacks on them were limited to efforts to damage their periscopes with hammers and dropping guncotton bombs. Use of nets to ensnare U-boats was also examined, as was a destroyer, Starfish, fitted with a spar torpedo. In all, 16 U-boats were destroyed during this phase of the campaign, while they themselves sank 370 ships totalling 750,000 GRT.

  • 英文を日本語訳して下さい。

    At 13:5, the ships formed into a line abreast formation 15 mi (13.0 nmi; 24.1 km) apart, with Glasgow at the eastern end, and started to steam north at 10 nautical miles (19 km; 12 mi) searching for Leipzig. At 16:17 Leipzig, accompanied by the other German ships, spotted smoke from the line of British ships. Spee ordered full speed so that Scharnhorst, Gneisenau and Leipzig were approaching the British at 20 nautical miles (37 km; 23 mi), with the slower light cruisers Dresden and Nürnberg some way behind. At 16:20, Glasgow and Otranto saw smoke to the north and then three ships at a range of 12 mi (10.4 nmi; 19.3 km). The British reversed direction, so that both fleets were moving south, and a chase began which lasted 90 minutes. Cradock was faced with a choice; he could either take his three cruisers capable of 20 kn (23 mph; 37 km/h), abandon Otranto and run from the Germans, or stay and fight with Otranto, which could only manage 16 kn (18 mph; 30 km/h). The German ships slowed at a range of 15,000 yd (13,720 m) to reorganise themselves for best positions, and to await best visibility, when the British to their west would be outlined against the setting sun. At 17:10, Cradock decided he must fight, and drew his ships closer together. He changed course to south-east and attempted to close upon the German ships while the sun remained high. Spee declined to engage and turned his faster ships away, maintaining the distance between the forces which sailed roughly parallel at a distance of 14,000 yd (12,800 m). At 18:18, Cradock again attempted to close, steering directly towards the enemy, which once again turned away to a greater range of 18,000 yd (16,460 m). At 18:50, the sun set; Spee closed to 12,000 yd (10,970 m) and commenced firing. The German ships had sixteen 21 cm (8 in) guns of comparable range to the two 9.2 in (234 mm) guns on Good Hope. One of these was hit within five minutes of the engagement's starting. Of the remaining 6 in (152 mm) guns on the British ships, most were in casemates along the sides of the ships, which continually flooded if the gun doors were opened to fire in heavy seas. The merchant cruiser Otranto—having only 4 in (100 mm) guns and being a much larger target than the other ships—retired west at full speed. Since the British 6 in (152 mm) guns had insufficient range to match the German 21 cm (8 in) guns, Cradock attempted to close on the German ships. By 19:30, he had reached 6,000 yd (5,490 m) but as he closed, the German fire became correspondingly more accurate. Good Hope and Monmouth caught fire, presenting easy targets to the German gunners now that darkness had fallen, whereas the German ships had disappeared into the dark. Monmouth was first to be silenced. Good Hope continued firing, continuing to close on the German ships and receiving more and more fire. By 19:50, she had also ceased firing; subsequently her forward section exploded, then she broke apart and sank, with no-one witness to the sinking.