War · September 20, 1187
839 years ago · Jerusalem, Kingdom of Jerusalem
The siege of Jerusalem lasted from 20 September to 2 October 1187, when Balian of Ibelin surrendered the city to the forces of the Ayyubid Sultanate under sultan Saladin. Earlier that summer, Egyptian forces under Saladin had defeated the kingdom's army and conquered several cities.
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The 840th anniversary falls on September 20, 2027.
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1754–1801Photo: Vladimir Borovikovsky · Public domain
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The Battle of Fulford was fought on the outskirts of the village of Fulford, just south of York in England, on 20 September 1066. King Harald III of Norway, also known as Harald Hardrada, a claimant to the English throne, and Tostig Godwinson, his English ally, fought and defeated the Northern Earls Edwin and Morcar.
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The Battle of Valmy, also known as the Cannonade of Valmy, was the first major victory by the army of France during the Revolutionary Wars that followed the French Revolution. The battle took place on 20 September 1792 as Prussian troops commanded by the Duke of Brunswick attempted to march on Paris.
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The Battle of the Alma (short for Battle of the Alma River) took place during the Crimean War between an allied expeditionary force (made up of French, British, and Ottoman forces) and Russian forces defending the Crimean Peninsula on 20 September 1854. The allies had made a surprise landing in Crimea on 14 September.
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The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to comprehensively prohibit nuclear weapons, with the ultimate goal being their total elimination.
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