While Japan had a large number of submarines, they did not make a significant impact on the war. In 1942, the Japanese fleet subs performed well, knocking out or damaging many Allied warships. However, Imperial Japanese Navy (and pre-war U.S.) doctrine stipulated that only fleet battles, not guerre de course (commerce raiding) could win naval campaigns. So, while the US had an unusually long supply line between its west coast and frontline areas, leaving it vulnerable to submarine attack, Japan used its submarines primarily for long-range reconnaissance and only occasionally attacked U.S. supply lines. The Japanese submarine offensive against Australia in 1942 and 1943 also achieved little.

Answer this question, if possible (if impossible, reply "unanswerable"): What did the Japanese submarine offensive against Austrailia achieve?
little
Medan Japan hade ett stort antal ubåtar gjorde de ingen nämnvärd påverkan på kriget. År 1942 presterade de japanska ubåtarna bra, och de slog ut eller skadade många allierade krigsfartyg. Imperial Japanese Navy (och förkrigstidens amerikanska) doktrin föreskrev dock att endast flottstrider, inte guerre de course (handelsräder) kunde vinna flottkampanjer. Medan USA hade en ovanligt lång försörjningslinje mellan sina västkust- och frontlinjeområden, vilket gjorde den sårbar för ubåtsattack, använde Japan sina ubåtar främst för långdistansspaning och endast då och då attackerade USA:s försörjningslinjer. Den japanska ubåtsoffensiven mot Australien 1942 och 1943 uppnådde också föga. Svara på denna fråga, om möjligt (om möjligt svara "osvarbart"): Vad uppnådde den japanska ubåtsoffensiven mot Austrailia?
While Japan had a large number of submarines, they made no significant impact on the war. In 1942, Japanese submarines performed well, striking out or injuring many Allied warships. However, the Imperial Japanese Navy (and pre-war American) doctrine provided that only naval battles, not guerre de course (trade raids) could win naval campaigns. While the United States had an unusually long supply line between its west coast and front line areas, making it vulnerable to submarine attack, Japan used its submarines primarily for long-range reconnaissance and only occasionally attacked United States supply lines. The Japanese submarine offensive against Australia in 1942 and 1943 also achieved little. Answer this question, if possible (if possible answer "unanswerable"): What did the Japanese submarine offensive against Austrailia achieve?
liten
small