All articles starting with S
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Siege of Xiangyang
The Siege of Xiangyang (襄阳之战) was the longest campaign of the Mongol conquest of the Song dynasty, ending in 1273 when Lü Wenhuan surrendered Xiangyang after counterweight trebuchets breached its walls.
Siege of Xuyi
The Siege of Xuyi was a failed 451 siege by Tuoba Tao of Northern Wei against the Liu Song city on the Huai River, defended by Zang Zhi.
Siege of Yangzhou (1276)
The siege of Yangzhou was a Mongol Yuan siege of the Southern Song stronghold of Yangzhou from February 1275 to mid-1276, long after the capital Lin'an fell.
Siege of Yanmen
The Siege of Yanmen (雁门之围) was a Turkic siege of the Sui town of Yanmen in 615, in which Emperor Yang was besieged by Shibikehan's forces for over a month.
Siege of Yorktown
Siege of Yorktown (September 28 - October 19, 1781), the last major battle of the American Revolutionary War, where Washington, Rochambeau, and de Grasse's French fleet trapped Cornwallis's 8,300-man army and forced its surrender.
Siege of Yoshida-Kōriyama Castle
The Siege of Yoshida-Kōriyama Castle (吉田郡山城の戦い), also called the Kōriyama campaign, was a 1540 to 1541 Sengoku battle where Mōri Motonari, aided by Ōuchi reinforcements, repelled the Amago clan.
Siege of Youzhou
The Siege of Youzhou (契丹围幽州) was a Khitan siege of Youzhou, present-day Beijing, in 917, during which the garrison held out for nearly 200 days.
Siege of Zaatcha
The Siege of Zaatcha (الزعاطشة), from July to November 1849, was a French operation against an oasis town near Biskra, Algeria, ending with the massacre of its population and resistance leader Sheikh Bouzian.
Siege of Zama
The siege of Zama was a failed Roman attempt in 109 BC, during the Jugurthine War, to capture Zama Regia, a royal Numidian city loyal to King Jugurtha.
Siege of Zamość (1648)
The Siege of Zamość (1648) was an unsuccessful siege of the fortress town of Zamość by Bohdan Khmelnytsky's Cossack-Tatar army during the 1648 Cossack uprising.
Siege of Zaoyang
The Siege of Zaoyang (枣阳之围) was a Jin siege of the Song town of Zaoyang, Hubei, during the Song–Jin wars of the early thirteenth century.
Siege of Zhongdu
The Siege of Zhongdu (中都之战) was the Mongol siege and capture of Zhongdu, the Jin dynasty capital at modern Beijing, from July 1214 to June 1215, after Emperor Xuanzong moved the court south.
Siege tower
A siege tower, also called a breaching tower, is a mobile wooden tower on wheels, built taller than a fortress wall so troops could cross onto it.
SiegedSec
SiegedSec was a hacking group associated with data leaks, website compromises, and politically framed attacks. It became active in 2022 and announced its dissolution in July 2024. The group publicly described itself.
Siegel zero
A Siegel zero, or Landau–Siegel zero, is a hypothetical real zero very close to 1 of a Dirichlet L-function, a central open problem in analytic number theory.
Siegen
Siegen is a university city of about 102,000 people in southern North Rhine-Westphalia, Germany, shaped by 2,500 years of iron mining and now the University of Siegen's home.
Siegendorf
Siegendorf, a market town in Burgenland, Austria (postal code 7011), home of ASV Siegendorf 1930, a workers' sports football club founded 1 June 1930, twice Burgenlandliga champions (2021/22, 2023/24), and the running club LC Siegendorf founded November 2022.
Sieges during the Syrian civil war
Sieges during the Syrian civil war were the sustained encirclement of towns by armed actors to cut off food, medicine, and civilians' movement, mostly by the Syrian state.
Sieges of Albazin
The Sieges of Albazin were two Qing attacks on the Russian fort of Albazin on the Amur in 1685 and 1686–1687, ending with the Treaty of Nerchinsk.
Siegfried (opera)
Siegfried is an 1876 opera by Richard Wagner, the third of the four Ring cycle dramas, following the hero's slaying of the dragon Fafner and awakening of Brünnhilde.
Siegfried & Roy
Siegfried & Roy, Siegfried Fischbacher and Roy Horn, German-American magicians famous for Las Vegas white tiger illusions at the Mirage (1990–2003), ended by the 2003 tiger mauling of Horn.
Siegfried Abraham Goebel
Siegfried Abraham Goebel (1844–1928) was a German Reformed theologian and New Testament scholar who served as court preacher at Halberstadt and professor of New Testament at the University of Bonn.
Siegfried Bethke
Siegfried Bethke, born 1954 in Ludwigshafen, Germany, is a German experimental particle physicist known for measuring the strong coupling constant and leading ATLAS research at the Max Planck Institute for Physics in Munich.
Siegfried Blechert
Siegfried Blechert (born 1946) is a German organic chemist known for ruthenium catalysts for olefin metathesis; he taught at Bonn and TU Berlin and joined the Leopoldina in 2006.
Siegfried Brietzke
Siegfried Brietzke, East German rower (SC DHfK Leipzig), won Olympic gold at three straight Games: coxless pairs 1972 with Mager, coxless fours 1976 and 1980; also four world titles.
Siegfried Glenzer
Siegfried Glenzer is a plasma physicist and director of the High Energy Density Science division at SLAC, known for x-ray Thomson scattering and the first fusion experiments at the National Ignition Facility.
Siegfried Großmann
Siegfried Großmann (1930–2025) was a German theoretical physicist at Philipps-Universität Marburg, regarded as a co-founder of chaos theory and one of the leading turbulence researchers of his generation.
Siegfried Hecker
Siegfried S. Hecker is an American metallurgist known for plutonium science who served as the fifth director of Los Alamos National Laboratory from 1986 to 1997.
Siegfried Hekimi
Siegfried Hekimi is a biologist at McGill University who studies the molecular genetics of aging, known for showing that mitochondrial superoxide signaling can trigger longevity.
Siegfried Herrmann
Siegfried Herrmann (1932-2017), East German middle- and long-distance runner; 1965 3,000 m world record 7:46.0; Olympian 1956 and 1964; later coach of 1980 race walk champion Hartwig Gauder.