Aztecs took gold tribute from their subject tribes and amassed it.

Spanish conquistadors looted the Aztecs gold. 

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Sir Francis Drake and other English pirates looted their gold from Spanish galleons. 

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British stopped being able to transport gold during World War I and II because german U-boats were sending significant fractions of Allied and especially British boats to the bottom of the ocean.

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Seizing gold vaults have always been an universal war objective.

Politicians have achieved to control monetary systems by controlling gold. 

 

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