December 26 in History

The Peace of Pressburg was signed in Pressburg on 26 December 1805 between French Emperor Napoleon Bonaparte and Holy Roman Emperor Francis II, as a consequence of the French victory over the Russians and Austrians at the Battle of Austerlitz. A truce was agreed on 4 December, and negotiations for the treaty began. The treaty was signed by Johann I Joseph, Prince of Liechtenstein, and the Hungarian Count Ignác Gyulay for the Austrian Empire and Charles Maurice de Talleyrand for France.

The Richmond Theatre fire occurred in Richmond, Virginia, United States, on Thursday, December 26, 1811. It devastated the Richmond Theatre, located on the north side of Broad Street between what is now Twelfth and College Streets. The fire killed 72 people, including Virginia's governor George William Smith, former U.S. senator Abraham B. Venable, and other government officials in what was the worst urban disaster in U.S. history at the time. The Monumental Church was erected on the site as a memorial to the fire.

In mathematics, the octonions are a normed division algebra over the real numbers, a kind of hypercomplex number system. The octonions are usually represented by the capital letter O, using boldface O or blackboard bold . Octonions have eight dimensions; twice the number of dimensions of the quaternions, of which they are an extension. They are noncommutative and nonassociative, but satisfy a weaker form of associativity; namely, they are alternative. They are also power associative.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union to preserve slavery in the United States, which they saw as threatened because of the election of Abraham Lincoln and the growing abolitionist movement in the North. The war lasted a little over four years, ending with Union victory, the dissolution of the Confederacy and the abolition of slavery, freeing four million African Americans.

The Dakota War of 1862, also known as the U.S.-Dakota War of 1862, the Sioux Uprising, the Dakota Uprising, the Sioux Outbreak of 1862, the Dakota Conflict, or Little Crow's War, was an armed conflict between the United States and several eastern bands of Dakota collectively known as the Santee Sioux. It began on August 18, 1862, when the Dakota, who were facing starvation and displacement, attacked the Lower Sioux Agency and white settlements along the Minnesota River valley in southwest Minnesota. The war lasted for five weeks and resulted in the deaths of hundreds of settlers and the displacement of thousands more. In the aftermath, the Dakota people were exiled from their homelands, forcibly sent to reservations in the Dakotas and Nebraska, and the State of Minnesota confiscated and sold all their remaining land in the state. Thirty-eight Dakota men were subsequently hanged for crimes committed during the conflict in the largest mass execution in US history.

Maria Salomea Skłodowska Curie, better known as Marie Curie, was a Polish and naturalised-French physicist and chemist. She shared the 1903 Nobel Prize in Physics with her husband Pierre Curie "for their joint researches on the radioactivity phenomena discovered by Professor Henri Becquerel". She won the 1911 Nobel Prize in Chemistry "[for] the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of this remarkable element".

Jean Sibelius was a Finnish composer of the late Romantic and early modern periods. He is widely regarded as his country's greatest composer, and his music is often credited with having helped Finland develop a stronger national identity when the country was struggling from several attempts at Russification in the late 19th century.

Winston Churchill's first address to the U.S. Congress was a 30-minute World War II-era radio-broadcast speech made in the chamber of the United States Senate on December 26, 1941. The prime minister of the United Kingdom addressed a joint meeting of the bicameral legislature of the United States about the state of the UK–U.S. alliance and their prospects for defeating the Axis powers.

George Smith Patton Jr. was a general in the United States Army who commanded the Seventh Army in the Mediterranean Theater of World War II, then the Third Army in France and Germany after the Allied invasion of Normandy in June 1944.

The Union of Soviet Socialist Republics (USSR), also known as the Soviet Union, 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, largest by area, and bordered twelve countries. A diverse multinational state, it was organized as a federal union of national republics, the largest and most populous being the Russian Soviet Federative Socialist Republic. 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.

Kwanzaa is an annual celebration of African-American culture from December 26 to January 1, culminating in a communal feast called Karamu, usually on the sixth day. It was created by activist Maulana Karenga based on Karenga's research of African harvest festival traditions from various parts of West, East, and Southeast Africa. Kwanzaa was first celebrated in 1966. A 2009 estimate placed the number of Americans who celebrate Kwanzaa between 500,000 and 2,000,000.

Pan Am Flight 799 was an international cargo flight from Los Angeles International Airport to Cam Ranh Airport in South Vietnam that crashed on December 26, 1968, near Anchorage, Alaska. The aircraft involved was a Boeing 707-321C aircraft operated by Pan American World Airways. All three crew members died in the crash.

The Tupolev Tu-144 is a Soviet supersonic passenger airliner designed by Tupolev that operated commercially from 1975 to 1983, including 1977–1978 passenger service.

The Rendlesham Forest incident was a series of reported sightings of unexplained lights near Rendlesham Forest in Suffolk, England, in December 1980, which became linked with alleged UFO landings. The events occurred just outside RAF Woodbridge, which was used at the time by the United States Air Force (USAF). USAF personnel, including deputy base commander Lieutenant Colonel Charles I. Halt, claimed to have seen things he described as a UFO.

The Supreme Soviet of the Union of Soviet Socialist Republics (SSUSSR) was the highest organ of state authority of the Soviet Union from 1936 to 1991. Based on the principle of unified power, it was the only branch of government in the Soviet state, and headed the unified state apparatus.

The Armed Islamic Group was one of the two main Islamist insurgent groups that fought the Algerian government and army in the Algerian Civil War.

Cyclone Lothar is regarded as the worst European windstorm recorded during the 20th century. Crossing France, Belgium, Luxembourg and Germany between 25 December and 27 December 1999, Cyclone Lothar's average winds reached up to 115 km/h inland (Orly), but with gusts exceeding 150 km/h, almost equivalent to a Category 2 hurricane, resulting in 110 deaths and more than €15 billion in damage, becoming the costliest European windstorm ever recorded.

On 26 December 2004, at 07:58:53 local time (UTC+7), a Mw 9.2–9.3 earthquake struck with its epicenter off the west coast of Aceh, in northern Sumatra, Indonesia. The undersea megathrust earthquake, known in the scientific community as the Sumatra–Andaman earthquake, was caused by a rupture along the fault boundary between the Burma plate and the Indian plate, and reached a maximum Mercalli intensity of IX in some areas.

The 2006 Hengchun earthquakes occurred on December 26 at 20:26 and 20:34 local time off the southwest coast of Taiwan in the Luzon Strait, which connects the South China Sea with the Philippine Sea. The International Seismological Centre measured the shocks at 7.0 and 6.9 on the moment magnitude scale. The earthquakes not only caused casualties and building damage, but several submarine communications cables were cut, disrupting telecommunication services in various parts of Asia.

The JSC Yakovlev Corporation is a Russian aircraft manufacturer, headquartered in the Aeroport District, Northern Administrative Okrug, Moscow. It is the manufacturer of the Sukhoi Su-30 family of interceptor/ground-attack aircraft. The company was founded in 1932 in the Transbaykal region of the Soviet Union as the Irkutsk Aviation Plant (IAP). It was formerly known as Irkut Corporation.

On December 26, 2021, a mass shooting took place at a Texaco convenience store in Garland, Texas. 14-year-old Abel Acosta, armed with a .40-caliber pistol, opened fire on several teenagers, killing three and seriously injuring one other.