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Duration of Dutch Empire (407 y) is 5 x Length of the Punic Wars (Rome v Carthage) (82 y)
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Land used for arable in Mali (2011) (5,680 km^2)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.