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Sinking of the Montevideo Maru
The sinking of the Montevideo Maru was the 1 July 1942 loss of a Japanese transport torpedoed by USS Sturgeon, killing over 1,000 Australian prisoners and internees from Rabaul.
Sinking of the Moskva
The Moskva (ex-Slava), Slava-class Project 1164 cruiser and flagship of Russia's Black Sea Fleet, sank 14 April 2022 after two Ukrainian Neptune missiles hit it; the largest Russian warship lost in combat since World War II.
Sinking of the Rainbow Warrior
The Rainbow Warrior, Greenpeace's flagship (a former trawler acquired 1978), was sunk by French DGSE limpet mines at Auckland on 10 July 1985 under Operation Satanique, killing photographer Fernando Pereira; France later admitted the attack and paid compensation.
Sinking of the RMS Lusitania
Sinking of the RMS Lusitania: 7 May 1915 torpedoing of the Cunard liner by German U-20 off Old Head of Kinsale, Ireland, killing about 1,198 including 128 Americans; second explosion and munitions cargo controversy.
Sino-Soviet border conflict
The Sino-Soviet border conflict (1969), also called the Zhenbao/Damansky Island crisis, was a seven-month undeclared border war between China and the USSR, marked by nuclear threats, October 1969 border talks, and final demarcation in 2008.
Sino-Vietnamese War (中越战争)
The Sino-Vietnamese War (中越战争), or Chinese-Vietnamese War, was a war between China and Vietnam in 1979, following Vietnam's invasion of Cambodia.
Sino–Kazakh War
Sino–Kazakh War: the 1756–1757 Qing military conflict with the Kazakh Khanate during the conquest of Dzungaria, ending in Abylai Khan's submission, tribute missions, and the 1759–1796 silk-for-horse trade.
Six-Day War
The Six-Day War, called the June War by Arabs, was a 1967 war in which Israel quickly defeated Egypt, Syria, and Jordan and captured Sinai, the West Bank, Gaza, and the Golan Heights.
Sixth Crusade
The Sixth Crusade, also known as the Crusade of Frederick II, was the 1228–1229 expedition in which excommunicated Emperor Frederick II recovered Jerusalem through the Treaty of Jaffa with Sultan al-Kamil.
Sixth Xhosa War
The Sixth Xhosa War, also called Hintsa's War, was an 1834–1835 frontier conflict in which Xhosa forces under Maqoma invaded the Cape Colony before British retaliation.
Skanderbeg's rebellion
Skanderbeg's rebellion, led by Gjergj Kastrioti, was an armed uprising against the Ottoman Empire in the central Balkans from 1443 to 1468, keeping core territory independent.
Slagters Nek Rebellion
The Slagters Nek Rebellion, also spelled Slachter's Nek, was an 1815 Boer rising against British authority in the eastern Cape Colony, ending with five rebels hanged in March 1816.
Slave rebellion
Slave rebellion: organized armed uprisings by enslaved people, from Rome's Servile Wars (135–132, 104–100, 73–71 BC) and Tacky's Revolt (1760–61) to the Haitian Revolution (1791–1804), Stono, the 1811 German Coast Uprising, and Nat Turner's 1831 revolt, ending slavery only in Haiti but influencing abolition.
Slovak National Uprising
The Slovak National Uprising (Slovenské národné povstanie, SNP) was an armed insurrection of the Slovak resistance against German occupation, fought from 29 August to 27 October 1944 with more than 80,000 soldiers.
Slovak Uprising of 1848–1849
The Slovak Uprising of 1848–1849 was the first armed political action of the Slovaks, proclaimed at Myjava by volunteers siding with the Habsburgs against Hungary.
Slovak–Hungarian War (1939)
The Slovak–Hungarian War, known as the "Little War," was a border war fought on 23 and 24 March 1939 between the Slovak State and Hungary, which gained Slovak territory.
Slutsk Uprising
The Slutsk Uprising (Слуцкае паўстанне) was an armed 1920 attempt by Belarusian forces loyal to the Belarusian People's Republic to defend the Slutsk district against the Red Army.
Smashing the Gang of Four
Smashing the Gang of Four (粉碎“四人帮”), the October 6 Coup or Huairen Hall incident: Hua Guofeng, Ye Jianying, and Wang Dongxing's bloodless 1976 arrest of Jiang Qing, Zhang Chunqiao, Yao Wenyuan, and Wang Hongwen, ending the Cultural Revolution.
Snake War
The Snake War (1864–1868) was an armed conflict in which Northern Paiute, Shoshone, and Bannock bands fought settlers and U.S. Army forces across Oregon, Idaho, California, and Nevada.
Soap made from human corpses
Soap made from human corpses refers to the World War II claim that Nazi Germany made soap from murdered Jews, uncorroborated except for a small experimental operation at Danzig.
Sobibor extermination camp
Sobibor was a Nazi Operation Reinhard killing center in occupied Poland, operating May 1942 to October 1943, where at least 167,000 people were gassed with carbon monoxide; prisoners staged an uprising on October 14, 1943, and about 50 escapees survived the war.
Sobibor uprising
The Sobibor uprising, also called the Sobibor revolt, was the October 14, 1943 escape and armed revolt by Jewish prisoners led by Leon Feldhendler and Alexander Pechersky at the Sobibor killing center in occupied Poland, in which 11 SS men were killed and about 300 prisoners escaped.
Societal breakdown in the Gaza Strip during the Gaza war
Societal breakdown in the Gaza Strip during the Gaza war: collapse of health care, water, food, education, economy, and civil order after October 7, 2023, with 77-year human development setback, 84% economic contraction, famine, and $71.4 billion reconstruction needs.
Soga–Mononobe conflict
The Soga–Mononobe conflict was a sixth-century power struggle at the Yamato court between the Soga and Mononobe clans over Buddhism, imperial succession, and the direction of the state.
Solhan massacre
The Solhan massacre was an overnight attack by armed men on the village of Solhan in northeastern Burkina Faso on 4 to 5 June 2021, killing about 160 civilians.
Solomon Islands campaign
The Solomon Islands campaign was a series of Allied operations in the Solomon Islands during World War II, beginning with the Guadalcanal landings in August 1942.
Somali Civil War
Somali Civil War: conflict since the late 1980s that overthrew Siad Barre in January 1991, caused state collapse and famine, and continues as an al-Shabaab insurgency.
Somali Civil War (2009–present)
Somali Civil War (2009–present), the ongoing phase of Somalia's civil war: the weak Transitional Federal Government versus al-Shabaab (al-Qaeda affiliate since 2012), AU missions AMISOM, ATMIS, and AUSSOM, the 2011 loss of Mogadishu, and reversed 2022–23 offensive gains.
Somali insurgency (2006–2009)
The Somali insurgency of 2006–2009 was the armed campaign by Islamist insurgent groups, above all al-Shabaab, against Somalia's Transitional Federal Government and its Ethiopian military backers after the December 2006 invasion.
Somalia affair
The Somalia affair was a 1992-1993 Canadian military scandal in which Canadian Airborne Regiment soldiers tortured and killed Somali teenager Shidane Arone, triggering the Létourneau commission, the Dishonoured Legacy report, the regiment's disbandment, and military justice reform.