5,963 articles
Invasion of the Waikato
The Invasion of the Waikato was an 1863–1864 British campaign against the Māori King movement in New Zealand, ending in Kīngitanga defeat and land confiscation.
Invasion of Trinidad (1797)
The Invasion of Trinidad (1797) was a British amphibious operation under General Sir Ralph Abercromby that captured the Spanish colony in February 1797 with little resistance.
Invasion of Yugoslavia
The Invasion of Yugoslavia (April War) began on April 6, 1941, when Axis powers attacked the Kingdom of Yugoslavia, leading to its partition and occupation until 1945.
Invasions of Afghanistan
Invasions of Afghanistan: the three Anglo-Afghan wars (1838-42, 1878-80, 1919), the Treaty of Gandamak, and the Soviet (1979-89) and US-led (2001) interventions, driven by Anglo-Russian rivalry and occupation costs.
Involvement of Northeast Indian insurgents in the Myanmar conflict
Northeast Indian insurgents (ULFA, NSCN-K, Meitei groups) use Myanmar as sanctuary, training ground, and arms corridor; since the 2021 coup they are entangled in Myanmar's civil war, prompting Indian strikes and border policy changes.
Iona Yakir
Iona Yakir (Иона Эммануилович Якир) was a Soviet Red Army commander of the Kiev Military District, executed in 1937 in the Tukhachevsky case and rehabilitated in 1957.
Iquicha War
The Iquicha War (1825–1828) was a monarchist rebellion in Huanta, Ayacucho, Peru, where peasant communities loyal to Spain fought the army of the new Republic of Peru.
Iran–Iraq War
The Iran–Iraq War (جنگ ایران و عراق, "imposed war") was the 1980–1988 conventional war begun by Iraq's invasion of Iran and ended by UNSCR 598, costing about one million casualties and $1.19 trillion.
Iran–Israel conflict
Iran–Israel conflict: hostility since the 1979 Iranian revolution, first a proxy and covert shadow war, then direct strikes in April and October 2024, the Twelve-Day War of June 2025 (610 Iranian, 28 Israeli deaths), and a joint US–Israel campaign against Iran launched 28 February 2026.
Iran–Saudi Arabia proxy war
Iran–Saudi Arabia proxy war: the Saudi-Iranian rivalry fought through proxies, chiefly in Yemen where Iran backs the Houthis against a Saudi-supported government; 2015 coalition intervention, 2022 truce, 2023 rapprochement, and renewed 2026 conflict.
Iranian Revolution (انقلاب ۱۳۵۷)
The Iranian Revolution (انقلاب ۱۳۵۷), or 1979 Islamic Revolution, overthrew Mohammad Reza Shah's Pahlavi monarchy and established the Islamic Republic under Ayatollah Khomeini, approved by referendum on April 1, 1979, with lasting economic and institutional consequences.
Iraq in the 2026 Iran war
Iraq in the 2026 Iran war: the secondary theater of the US-Israeli war on Iran begun February 28, 2026. Iraq declared neutrality but Iran-aligned PMF militias attacked US targets, the Strait of Hormuz closure cut oil trade, and the IMF forecast a 6.8 percent economic contraction.
Iraq Inquiry
The Iraq Inquiry, known as the Chilcot Inquiry, was a British inquiry chaired by Sir John Chilcot that examined the UK's role in the Iraq conflict.
Iraq War
The Iraq War (2003-2011), also called Operation Iraqi Freedom, began with the US-led invasion of Iraq on March 20, 2003, to remove Saddam Hussein and eliminate claimed WMD; none were found, an eight-year occupation followed, and the last US combat troops left December 18, 2011.
Iraq War documents leak
The Iraq War documents leak, also known as the Iraq War Logs, was WikiLeaks' October 2010 release of 391,832 US military field reports from the Iraq War.
Iraqi insurgency (2003–2011)
The Iraqi insurgency (2003–2011), or Ba'athist insurgency in Iraq, was a multi-group armed resistance to the US occupation that peaked in sectarian violence in 2006 and 2007 before US combat troops withdrew in December 2011.
Iraqi invasion of Iran
The Iraqi invasion of Iran was the attack Saddam Hussein's Iraq launched on 22 September 1980, opening the eight-year Iran–Iraq War over the Shatt al-Arab and Khuzestan.
Iraqi invasion of Kuwait
The Iraqi invasion of Kuwait was a surprise attack by about 100,000 Iraqi troops under Saddam Hussein on August 2, 1990, which triggered the 1991 Gulf War.
Iraqi strikes on Saudi Arabia
Iraqi strikes on Saudi Arabia: the 37 Scud missile attacks Iraq fired at Saudi Arabia in the 1991 Gulf War, including the Dhahran barracks strike that killed 28 U.S. servicemen, plus later drone attacks on Saudi oil facilities by Iran-aligned Iraqi militias.
Irish neutrality during World War II
Irish neutrality in World War II (the Emergency): Éire under Éamon de Valera stayed neutral from 3 September 1939, enabled by the 1938 return of the Treaty ports, unlike belligerent dominions and most of Europe.
Irma Grese
Irma Grese, born Irmgard Ilse Ida Grese, was a German concentration camp guard at Ravensbrück, Auschwitz-Birkenau, and Bergen-Belsen, convicted of war crimes and hanged in 1945 at 22.
Iron Brigade
Iron Brigade (Iron Brigade of the West): Union Civil War infantry brigade of the 2nd, 6th, 7th Wisconsin, 19th Indiana, and 24th Michigan regiments in the Army of the Potomac, famed for heavy casualties at Brawner's Farm, Antietam, and Gettysburg.
Iron Wall (חומת הברזל) (Israeli military operation)
Operation Iron Wall (חומת ברזל) is the Israeli military operation launched 21 January 2025 in Jenin and expanded to Tulkarm and Nur Shams camps, causing the West Bank's largest displacement since 1967, over 40,000 displaced, and destruction of more than 1,000 homes.
Iroquois conquest of the Susquehannock
The Iroquois conquest of the Susquehannock was a 17th-century conflict in which the Five Nations claimed the Susquehannock, weakened by war and smallpox, as conquered by right of conquest.
Iroquois Theatre fire
The Iroquois Theatre fire was the December 30, 1903 stage fire in Chicago that killed 602 people, the deadliest theater and single-building fire in U.S. history, caused by failed exits, a snagged fire curtain, and missing fire protection.
Irregular military
Irregular military: forces outside a state's formal armed forces, and the doctrine of irregular warfare (IW), defined by DoD as indirect, asymmetric, non-attributable campaigns by state and non-state actors, from Cold War guerrilla doctrine to great power competition.
Isaaq genocide
The Isaaq genocide was the campaign of mass killing and bombardment by Siad Barre's Somali government against the Isaaq clan of northern Somalia, mainly between 1987 and 1989.
Isatabu Freedom Movement
Isatabu Freedom Movement (IFM), also called Guadalcanal Revolutionary Army, a Guadalcanal militia active 1998–2003 that expelled Malaitan settlers, fought the Malaita Eagle Force, and was disbanded after RAMSI's 2003 intervention.
Isatay and Makhambet uprising
The Isatay and Makhambet uprising was a Kazakh revolt of 1836–1838 against Russian colonial rule and Khan Zhangir, led by Isatay Taimanuly and Makhambet Otemisuly.
Isla Vista attacks
The Isla Vista attacks of May 23, 2014: Elliot Rodger, 22, killed six people and wounded 13 near UC Santa Barbara. His misogynist manifesto made him an incel icon and spurred California's red flag law.