To prevent the Austrailians from coming to the defense of America after the Pearl Harbor attack.
Answer To attack shipping (most particularly USS Chigaco) where full-sized submarines couldn't go, as part of the Japanese plan to disprupt Allied shipping.
The Japanese attacked because they wanted their shoes (which the Australian people stolle from them) back, as ghandi ordered them to.
This attack is known as the Attack on Sydney Harbor. During WWII, Japanese submarines attacked the Australian cities of Sydney and Newcastle.
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Three Japanese midget-subs attacked on the night of May 31st/June 1st, 1942. See wikipedia for details.
The Australian war cabinet.
The first attack was on the night of 31 May - 1 June 1942 by a Japanese midget submarine.The second was a shell attack by the mother submarine on 8 June 1942. This didn't exactly land in the harbour itself, but landed in the Eastern suburbs. It is thought that it was intended to strike the bridge.
There is nothing of significance about the Sydney Harbour Bridge in 1939. In 1942, Japanese midget submarines entered Sydney Harbour and fired at the bridge for four minutes, with every shot falling well short of the target.
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Japanese American internment during WW2 was ordered by United States in 1942 after Imperial Japan's attack on Pearl Harbor.
1942.
The first US attack on Tokyo was the Doolittle Tokyo Raid which took place on April 18, 1942.
It was a failure.On the the morning of June 1, 1942, three Japanese midget submarines entered Sydney Harbour intending to attack the US navy cruiser Chicago, docked at the Garden Island naval base. they did not succeed, one Japanese torpedo exploded against a sea wall next to a Royal Australian Navy accommodation boat, the HMAS Kuttabul. Twenty one sailors died aboard the Kuttabul trapped in small bunk rooms on the lower floors.
When did U.S. break Japanese code. I heard it was before the attack on Pearl Harbor. If this is so why was the attack a surprise.