January 9 in History

The Treaty of Jassy, signed at Iași (Jassy) in Moldavia, was a pact between the Russian and Ottoman Empires ending the Russo-Turkish War of 1787–92 and confirming Russia's increasing dominance in the Black Sea.

The prime minister of the United Kingdom is the head of government of the United Kingdom. The prime minister advises the sovereign on the exercise of much of the royal prerogative, chairs the Cabinet, and selects its ministers. Modern prime ministers hold office by virtue of their ability to command the confidence of the House of Commons, so they are invariably members of Parliament.

Sir Humphry Davy, 1st Baronet was a British chemist and inventor who invented the Davy lamp and an early form of arc lamp. He is also remembered for isolating, by using electricity, several elements for the first time: potassium and sodium in 1807 and calcium, strontium, barium, magnesium and boron the following year, as well as for discovering the elemental nature of chlorine and iodine. Davy also studied the forces involved in these separations, inventing the new field of electrochemistry. He is credited with discovering clathrate hydrates. In 1799, he experimented with nitrous oxide and was astonished at how it made him laugh. He nicknamed it "laughing gas" and wrote about its potential as an anaesthetic to relieve pain during surgery. Davy was a baronet, President of the Royal Society (PRS), Member of the Royal Irish Academy (MRIA), a founder member and Fellow of the Geological Society of London, a member of the Royal Geological Society of Cornwall, and a member of the American Philosophical Society. Berzelius called Davy's 1806 Bakerian Lecture "On Some Chemical Agencies of Electricity" "one of the best memoirs which has ever enriched the theory of chemistry."

The French Academy of Sciences is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academies of Sciences.

Rajab Ali Khan, also known as Havildar Rajab Ali, was a soldier of the Bengal Regiment who defected during the Sepoy Revolt of 1857. He commanded the rebels at Chittagong and was chased by British forces as far as Sylhet and Manipur.

Mississippi is a state in the Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the southwest, and Arkansas to the northwest. Mississippi's western boundary is largely defined by the Mississippi River, or its historical course. Mississippi is the 32nd largest by area and 35th-most populous of the 50 U.S. states and has the lowest per-capita income. Jackson is both the state's capital and largest city. Greater Jackson is the state's most populous metropolitan area, with a population of 591,978 in 2020. Other major cities include Gulfport, Southaven, Hattiesburg, Biloxi, Olive Branch, Tupelo, Meridian, and Greenville.

Hallam Tennyson, 2nd Baron Tennyson was a British aristocrat who served as the second governor-general of Australia, in office from 1903 to 1904. He was previously Governor of South Australia from 1899 to 1902.

Phi Beta Sigma Fraternity, Inc. (ΦΒΣ) is a historically African American fraternity. It was founded at Howard University in Washington, D.C. in 1914. The fraternity's founders, A. Langston Taylor, Leonard F. Morse, and Charles I. Brown, wanted to organize a Greek letter fraternity that would exemplify the ideals of Brotherhood, Scholarship and Service while taking an inclusive perspective to serve the community as opposed to having an exclusive purpose. The Fraternity was built on the principles of brotherhood, Scholarship, and Service, with the goal of creating an organization that would serve both college campuses and surrounding communities. The fraternity exceeded the prevailing models of Black Greek-Letter fraternal organizations by being the first to establish alumni chapters, youth mentoring clubs, a federal credit union, chapters in Africa, and a collegiate chapter outside of the United States. It is the only fraternity to hold a constitutional bond with a historically African-American sorority, Zeta Phi Beta, which was founded on January 16, 1920, at Howard University in Washington, D.C., through the efforts of members of Phi Beta Sigma.

The Battle of Rafa, also known as the Action of Rafah, fought on 9 January 1917, was the third and final battle to complete the recapture of the Sinai Peninsula by British forces during the Sinai and Palestine campaign of the First World War. The Desert Column of the Egyptian Expeditionary Force (EEF) attacked an entrenched Ottoman Army garrison at El Magruntein to the south of Rafah, close to the frontier between the Sultanate of Egypt and the Ottoman Empire, to the north and east of Sheikh Zowaiid. The attack marked the beginning of fighting in the Ottoman territory of Palestine.

The Ukrainian War of Independence, also referred to as the Ukrainian–Soviet War in Ukraine, lasted from March 1917 to November 1921 and was part of the wider Russian Civil War. It saw the establishment and development of an independent Ukrainian republic, most of which was absorbed into the Ukrainian Soviet Socialist Republic between 1919 and 1920. The Ukrainian Soviet Socialist Republic was one of the constituent republics of the Soviet Union between 1922 and 1991.

Juan de la Cierva y Codorníu, 1st Count of la Cierva, was a Spanish civil engineer, pilot and a self-taught aeronautical engineer. His most famous accomplishment was the invention in 1920 of a rotorcraft called Autogiro, a single-rotor type of aircraft that came to be called autogyro in the English language. In 1923, after four years of experimentation, De la Cierva developed the articulated rotor, which resulted in the world's first successful flight of a stable rotary-wing aircraft, with his C.4 prototype.

The Laurier Palace Theatre fire, sometimes known as the Saddest fire or the Laurier Palace Theatre crush, occurred in a movie theatre in Montreal, Quebec, on January 9, 1927, killing 78 people. The theatre was located at 3215 Saint Catherine Street East, just east of Dézéry St.

Sixth Army is a theater army of the United States Army. The Army service component command of United States Southern Command, its area of responsibility includes 31 countries and 15 areas of special sovereignty in Central and South America and the Caribbean. It is headquartered at Fort Sam Houston.

The Vega de Tera disaster, was a flood that occurred on the early morning of 9 January 1959 in the Province of Zamora, Spain. The flood was caused by the failure of a dam, releasing water from the Vega de Tera reservoir. A total of 144 of the 664 residents in Ribadelago were killed. It was the first of two fatal dam failures in Europe that year; in December, the collapse of the Malpasset Dam resulted in over 400 fatalities.

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a transcontinental country that spanned much of Eurasia from 1922 until its dissolution in 1991. It was the world's third-most populous country, the largest by area, and bordered twelve countries. A diverse multinational state, it was organized as a federal union of national republics, with the largest and most populous being the Russian SFSR. In practice, its government and economy were highly centralized. As a one-party state governed by the Communist Party, it was the flagship communist state. Its capital and largest city was Moscow.

Martyrs' Day is a Panamanian day of national mourning which commemorates the January 9, 1964 protests over the sovereignty of the Panama Canal Zone. The protest started after a Panamanian flag was torn and students were killed during a conflict with Canal Zone Police officers and Canal Zone residents. It is also known as the Flag Incident or Flag Protests.

The National Assembly of Republika Srpska is the legislative body of Republika Srpska, one of two entities of Bosnia and Herzegovina. The current assembly is the ninth since the entity's founding.

The First Chechen War, also referred to as the First Russo-Chechen War, was a conflict between the separatist Chechen Republic of Ichkeria and the Russian Federation from 1994 to 1996. The conflict ended in a peace treaty that saw Russian forces withdraw from the territory only for them to invade again three years later sparking the Second Chechen War of 1999–2009.

TANS Peru Flight 222 was a domestic passenger flight from Lima, Peru to Chachapoyas with a stopover at Chiclayo, which crashed on 9 January 2003. The flight was operated by a Fokker F28-1000 Fellowship short range airliner. The aircraft crashed into the side of a hill while on approach to Chachapoyas Airport. All 46 passengers and crew aboard were killed in the deadliest crash in the airline's history.

Mahmoud Abbas, also known by the kunya Abu Mazen, is a Palestinian politician who has been serving as the second president of Palestine and the Palestinian National Authority (PNA) since 2005. He has also been the fourth chairman of the Palestine Liberation Organization (PLO) since 2004. Abbas is also a member of the Fatah party and was elected the party's chairman in 2009.

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, in Silicon Valley, and known for consumer electronics, software and online services. Founded in 1976 as Apple Computer Company by Steve Jobs, Steve Wozniak and Ronald Wayne, the company was incorporated by Jobs and Wozniak as Apple Computer, Inc. the following year. Its current name was adopted in 2007 as the company expanded its focus from computers to consumer electronics. Apple is one of the Big Tech companies.

On 9 January 2014, an explosion occurred at a Mitsubishi Materials chemical plant in Yokkaichi, Mie, Japan, killing at least five people and injuring 17 others.

On 9 January 2015, 75 people died and 230 were made ill after drinking contaminated beer at a funeral in Mozambique. All of the people affected had consumed the local beer, pombe, on 9 January, which had been inadvertently contaminated by the bacterium Burkholderia gladioli which produced the toxic compound bongkrekic acid.