On This Day🌄 December15

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Kingdom Day in Aruba, Curaçao, the Netherlands, and Sint Maarten (1954)

Zamenhof Day in Esperanto culture

687 – Sergius was elected pope, ending the last disputed sede vacante of the Byzantine Papacy.

1467 – Troops under Stephen III of Moldavia defeated the forces of Matthias Corvinus of Hungary in present-day Baia, Romania.

1906 – The Great Northern, Piccadilly and Brompton Railway (poster pictured), a 14.17-kilometre (8.80 mi) long deep-level underground tube railway connecting Hammersmith and Finsbury Park, London, opened.

1942 – World War II: The Americans engaged Imperial Japanese forces at the Battle of Mount Austen, the Galloping Horse, and the Sea Horse in the hills near the Matanikau River area on Guadalcanal during the Guadalcanal Campaign.

1961 – Former Nazi leader Adolf Eichmann was sentenced to death after being found guilty on fifteen criminal charges, including war crimes and crimes against humanity.