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Boshin War: Tokugawa rebels establish the Ezo Republic in Hokkaidō.
Spanish–American War: Battle of Manila Bay: The Asiatic Squadron of the United States Navy destroys the Pacific Squadron of the Spanish Navy after a seven-hour battle. Spain loses all seven of its ships, and 381 Spanish sailors die. There are no American vessel losses or combat deaths.
The international aid organization Doctors Without Borders is founded by Bernard Kouchner and a group of journalists in Paris, France.
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