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  http://afe.easia.columbia.edu/special/japan_1750_perry.htm
The Treaty of Kanagawa is later signed between Japan and the USA a year later - 
  
  Commodore Matthew Perry of the U.S Navy, sailed into Tokyo harbor and the Treaty of Kanagawa was signed between Japan and USA
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  Xianfeng Emperor authorized negotiations for the treaty on May 29, 1858 but the treaty with the British was signed less than a month later on June 25.
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  Specific dates are N/A
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  Beginning the Nanjing massacre.
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