A plot to put Trịnh Sâm's eldest son Trịnh Khải in place of the favourite's son Trịnh Cán was uncovered; Khải was imprisoned and several high officials punished, deepening the rift inside the Lê–Trịnh house.
Political
Canh Tý case
- 1780
- Southeast Asia
Meanwhile, elsewhere
- 1789 – 1799French RevolutionEurope
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- 17th century – 19th centuryAge of EnlightenmentEurope
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- 4 July 1776United States Declaration of IndependenceNorth America
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- 30 April 1803Louisiana PurchaseNorth America
- 18th century – 19th centuryRomanticism