All articles starting with a number or symbol
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1st Canadian Division
The 1st Canadian Division is a formation of the Canadian Army headquartered at CFB Edmonton, responsible for generating high-readiness combat power, with roughly 14,000 personnel.
1st Cavalry Division (United States)
The 1st Cavalry Division, nicknamed America's First Team, is an armored division of the United States Army at Fort Cavazos, Texas, active since its 1921 activation at Fort Bliss.
1st century
The 1st century (1–100 CE), the era of the Roman and Han empires, Parthia, and the Kushans, when the Silk Road trade in Chinese silk flourished and Christianity began in Judea.
1st Dalai Lama
Gedun Drupa, also rendered Gendun Drub, was a Tibetan Gelug monk who founded Tashilhunpo Monastery in Shigatse in 1447 and was named 1st Dalai Lama posthumously.
1st Infantry Division (United States)
The 1st Infantry Division, nicknamed the Big Red One, is the US Army's oldest continuously serving division, organized in 1917 and based at Fort Riley, Kansas.
1st Lok Sabha
1st Lok Sabha, India's first House of the People, elected 1951-52 for 489 seats under Sukumar Sen's Election Commission; 173,212,343 electors, 44.87% turnout, constituted 2 April 1952, dissolved 4 April 1957.
1st Marine Division
The 1st Marine Division ("Old Breed," "Blue Diamond"), activated February 1, 1941, is the oldest, largest, and most decorated USMC division, headquartered at Camp Pendleton with about 20,000 Marines, serving as I MEF's ground combat element from Guadalcanal to Iraq and Afghanistan.
1st millennium BC
The 1st millennium BC (1000 BC to 1 BC, no year zero) saw the Iron Age spread, the Neo-Assyrian and Achaemenid empires, the Axial Age of Jaspers, and the rise of Mauryan, Qin-Han, and Roman universal empires linked by trade.
1st Minnesota Infantry Regiment
The 1st Minnesota Infantry Regiment, also called the First Minnesota Volunteers, was the first Union regiment tendered in the Civil War (April 1861). At Gettysburg on July 2, 1863, 262 men charged, losing 215 (82%), the highest single-engagement casualty rate of any Union regiment.
1st Multi-Domain Task Force
1st Multi-Domain Task Force: US Army theater-level unit activated September 16, 2020 at Joint Base Lewis-McChord, aligned to U.S. Army Pacific; fields Dark Eagle LRHW, Mid-Range Capability (Typhon-type SM-6/Tomahawk), IFPC-HPM; merged with 7th Infantry Division in 2026.
1st Parachute Division
1st Parachute Division (1. Fallschirmjäger-Division), German Luftwaffe elite airborne division formed May 1943 from the 7th Flieger Division; fought in Italy from Sicily to Monte Cassino and Bologna, committed massacres including Pietransieri, surrendered May 1945.
1st Reconnaissance Battalion
1st Reconnaissance Battalion (1st Recon Bn), USMC reconnaissance battalion of the 1st Marine Division at Camp Pendleton. Traces to 1937; fought WWII, Korea, Vietnam, Iraq; now supports littoral regiments.
1st Special Forces Group (United States)
The 1st Special Forces Group (Airborne), "First in Asia," is the US Army's lead Special Forces group for the Indo-Pacific, based at Joint Base Lewis-McChord with a battalion on Okinawa, activated 1957 in Japan, inactivated 1974, reactivated 1984.
1st SS Panzer Division Leibstandarte SS Adolf Hitler
The 1st SS Panzer Division Leibstandarte SS Adolf Hitler (LSSAH) was a Waffen-SS division of Nazi Germany that began as Hitler's personal bodyguard in 1933.
1st United States Congress
The 1st United States Congress (1789–1791), also called the First Federal Congress, met at Federal Hall, New York, created the executive departments and federal courts, enacted the Tariff of 1789, and proposed the Bill of Rights.
1T-phase metallic MoS2
The metallic 1T phase of MoS2 is a metastable polymorph of molybdenum disulfide in which octahedral molybdenum coordination removes the band gap, enabling low-resistance transistor contacts and hydrogen-evolution electrocatalysis.
1T-TaS2
1T-TaS2 is a layered tantalum disulfide compound whose charge density wave order and Mott localization coexist at low temperature, underlining proposed CDW-based memory, switching, and oscillator devices.
1T-TiSe2
1T-TiSe2 is a layered titanium diselenide, a small-gap semiconductor that forms a 2 × 2 × 2 charge density wave below 200 K and is a leading excitonic insulator candidate.
1T′-WTe2
1T′-WTe2 is tungsten ditelluride in its distorted octahedral phase, a layered transition metal dichalcogenide where tungsten atoms form zigzag chains; its monolayer is a candidate quantum spin Hall insulator.
1Verse
1Verse (Korean: 유니버스) is a five-member K-pop boy group debuted in July 2025 by the independent Seoul label Singing Beetle, known for including two North Korean defectors, Hyuk and Seok.
1win
1win is an offshore online gambling brand offering a sportsbook, casino, and poker under one account balance, launched in 2018 by rebranding the bookmaker FirstBet and operating through Curaçao-licensed entities.
1X Technologies
1X Technologies, formerly Halodi Robotics, is a humanoid robotics company founded in Norway in 2014 and now based in Palo Alto, California, known for the NEO home robot launched in 2025.
1X World Model
The 1X World Model is a generative video world model by the robotics company 1X, launched in January 2026 to power its NEO humanoid robot.
1xBet
1xBet, online sports betting and casino operator founded in Russia, licensed via Caecus N.V. in Curaçao (OGL/2024/1262/0493) and Anjouan; major sports sponsor (Barcelona, FIBA, CAF) with fines, UK suspension, and Dutch bankruptcy on record.
1Z Entertainment
1Z Entertainment (Onez Entertainment Corp.) is a Philippine artist management and music label founded by the five members of SB19, launched October 2023 after leaving ShowBT; it manages SB19 and debuted girl group XONARA.
1药网 (111, Inc.)
111, Inc., known in Chinese as 1药网, is a Shanghai-based online pharmacy and digital health platform founded by Yu Gang and Liu Junling, listed on NASDAQ since 2018.
2
2, or two, is the natural number after 1 and the unique even prime, with exactly two divisors, making it the base of the binary system in computing.
2 + 2 = 5
2 + 2 = 5 is a mathematical falsehood famous as the slogan of totalitarian truth-control in Orwell's Nineteen Eighty-Four, drawn from a 1930s Soviet Five-Year Plan propaganda slogan and earlier literature.
2 aminobutane
2-Aminobutane (sec-butylamine, 2-AB, CAS 13952-84-6) is a chiral primary aliphatic amine used as a post-harvest citrus fungicide discovered in 1962, not EU-approved, and also a FEMA-listed flavoring agent.
2 Broke Girls
2 Broke Girls: CBS sitcom (2011-2017) co-created by Whitney Cummings and Michael Patrick King; Kat Dennings and Beth Behrs as diner waitresses Max Black and Caroline Channing chasing a cupcake business; six seasons, 138 episodes, one Primetime Emmy, canceled in 2017.