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By the summer of 1942.
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They were at Australians' door step.
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Their reach extended all the way down
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to a small remote island in the south Pacific.
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Guadalcanal.
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Here, the Japanese were rapidly building a airfield.
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If they completed that airfield.
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They can effectively chock off US supply line to Australia.
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denying the United States,
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a base from which to wage the rest of the war in the pacific.
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In August of 1942,
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almost 9 months after the attack on Pearl Harbour.