BIBLIOGRAPHY
Wikipedia「Financial history of the Dutch Republic」「Eighty Years’ War」
Wikipedia (according to the sources of each article)

Claims Supported by This Source
- The revenue of the province of Holland increased tenfold; the main tax was an excise on necessities.
- Borrowed an average of 4 million guilders per year to curb tax increases.
- The Eighty Years' War lasted from 1566/1568 to 1648 ("Eighty Years' War").
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