World History

Which of these was called the "Impregnable Fortress" by the British?

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What natural occurrence was said to have helped the British navy defeat the Spanish Armada in 1588?
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Charlemagne was crowned Emperor of the Romans on Christmas day of what year?
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What year did the nuclear-related accident at Three Mile Island occur?
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What year did the historical event, "Nixon visits China", occur?
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Prime Minister Kim Campbell followed Margaret Thatcher as the only other woman to sit at what table?
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By what nickname was Oliver Cromwell known?
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The first pocket calculator made by Texas Instruments sold for what average price in 1971?
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