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- U. S. Grant Sharp Jr.Ulysses Simpson Grant Sharp Jr. (April 2, 1906 – December 12, 2001) was a four-star admira
- U.S. Route 183 in KansasU.S. Route 183 (US-183) is a part of the U.S. Highway System that runs from US-77 in Refug
- Ubangi-Shari1903–1960 French colony in Central Africa
- Ubari conflictThe Ubari conflict was a territorial dispute between the Tuareg and Tubu tribes over contr
- UK Withdrawal from the European Union (Continuity) (Scotland) Act 2021The UK Withdrawal from the European Union (Continuity) (Scotland) Act 2021 (known colloqui
- Ulrich WegenerUlrich Klaus Wegener (22 August 1929 – 28 December 2017) was a German police officer of th
- Ulster loyalismPro-UK political ideology in Northern Ireland
- Ulster Volunteer ForceUlster loyalist paramilitary group
- Unexplained wealth of the Marcos familyWealth of the Marcos family
- Unification of NepalSeries of battles that shaped modern day Nepal
- Unitatis redintegratioUnitatis redintegratio (Restoration of unity) is the Second Vatican Council's decree on ec
- United Arab Republic occupation of the Gaza StripEgyptian military rule over the Gaza Strip (1949–1967)
- United Democratic Front (South Africa)1983–1991 anti-apartheid organisation
- United IrelandProposition that Ireland be a single state
- United Jihad CouncilJihadist organisation formed by the Pakistan Army
- United Nations Interim Administration Mission in KosovoOfficially mandated mission of the United Nations in Kosovo
- United Nations Interim Security Force for AbyeiUnited Nations peacekeeping mission
- United Nations Mission in Sierra LeoneThe United Nations Mission in Sierra Leone (UNAMSIL) was a United Nations peacekeeping ope
- United Nations Mission in South SudanUnited Nations peacekeeping mission for South Sudan
- United Nations Mission in the Central African RepublicThe United Nations Mission in the Central African Republic, more commonly known as MINURCA
- United Nations Mission of Observers in TajikistanThe United Nations Mission of Observers in Tajikistan (UNMOT) was a peacekeeping mission e
- United Nations Operation in Somalia IISecond phase of UN military intervention in Somalia
- United Nations Operation in the Congo1960s United Nations military operation
- United Nations Partition Plan for Palestine1947 plan to divide British Palestine
- United Nations Protection ForceMilitary unit
- United Nations Security Council Resolution 181United Nations Security Council Resolution 181, adopted on August 7, 1963, was concerned w
- United Nations–administered East TimorUN-administered territory from 1999 and 2002
- United States Army Biological Warfare LaboratoriesThe U.S. Army Biological Warfare Laboratories (USBWL) was a suite of research laboratories
- United States Army Military Government in Korea1945–1948 U.S.-occupied southern Korea
- United States bombing of the Chinese embassy in Belgrade1999 bombing of a diplomatic mission
- United States diplomatic cables leak2010–2011 release of 251,287 diplomatic cables
- United States District Court for the Middle District of AlabamaThe United States District Court for the Middle District of Alabama (in case citations, M.
- United States invasion of Afghanistan2001 multinational military operation
- United States invasion of Grenada1983 United States-led military invasion
- United States invasion of Panama1989 military action in Panama
- United States involvement in regime change in Latin AmericaCold War events
- USS Harry S. TrumanUS Navy Nimitz-class aircraft carrier
- USS Missouri (BB-63)Iowa-class battleship of the U.S. Navy