In History, Today on December 30

The World Health Organization was alerted to several cases of pneumonia in Wuhan, China, which would later be identified as the novel coronavirus (COVID-19), leading to a global pandemic.

The United States and NATO formally end their combat mission in Afghanistan, transitioning to a support role for Afghan security forces.

A suicide bombing at the Volgograd railway station in Russia killed at least 18 people and injured dozens. The attack was part of a series of bombings in the city, raising security concerns ahead of the 2014 Winter Olympics in Sochi.

The Samoan government officially changed the country's time zone by skipping December 30, 2011, to align its calendar with its main trading partners, Australia and New Zealand. This change was intended to improve economic relations and streamline business operations.

Former Iraqi President Saddam Hussein was executed by hanging after being convicted of crimes against humanity by the Iraqi Special Tribunal. His execution marked the end of a significant chapter in Iraq's post-invasion history.

A fire at the República Cromañón nightclub in Buenos Aires, Argentina, killed 194 people and injured over 1,400. The tragedy occurred during a rock concert when a flare ignited the foam ceiling, leading to a deadly blaze.

In Bangkok, Thailand, a fire at the Santika Club killed 66 people and injured over 200.

In Hong Kong, about twenty people died when a used oil ship exploded and sank in Victoria Harbour.

In the Indian state of Assam, a passenger train was bombed by Bodo separatists, resulting in the deaths of 26 people.

Israel and the Vatican established diplomatic relations, marking a significant step in the improvement of Jewish-Catholic relations following centuries of tension.

President Richard Nixon orders a halt to the bombing of North Vietnam above the 20th parallel, thus ending the intense bombing campaign known as Operation Linebacker II.

King Michael I of Romania was forced to abdicate the throne by the Communist Party of Romania, marking the end of the Romanian monarchy and the establishment of a communist regime.

Astronomer Edwin Hubble announced the existence of galaxies beyond the Milky Way, fundamentally changing the understanding of the universe and establishing the field of extragalactic astronomy.

The Union of Soviet Socialist Republics (USSR) was officially established, uniting Russia, Ukraine, Belarus, and the Transcaucasian Federation (comprising Armenia, Azerbaijan, and Georgia) into a single federal state.

The Russian mystic Grigori Rasputin is murdered by a group of conservative noblemen who sought to end his influence over the Russian royal family.

A fire at the Iroquois Theatre in Chicago resulted in the deaths of at least 602 people, making it the deadliest single-building fire in U.S. history at the time.

José Rizal, a Filipino nationalist and revolutionary hero, was executed by a firing squad in Manila. His execution galvanized Filipino revolutionaries and contributed to the eventual success of the Philippine Revolution against Spanish rule.

The Gadsden Purchase was finalized, in which the United States agreed to pay Mexico $10 million for a 29,670 square mile region of present-day southern Arizona and southwestern New Mexico. This purchase facilitated the construction of a southern transcontinental railroad.

The United States takes formal possession of the Louisiana Territory from France during the ceremonial transfer in St. Louis, known as the Three Flags Day.

The Spanish treasure galleon San José, carrying gold, silver, and emeralds, sank off the coast of Cartagena, Colombia, during a battle with a British squadron commanded by Commodore Charles Wager.

A fleet of 5 Spanish galleys was caught in a storm and wrecked in the Strait of Gibraltar. This represents a significant loss for Spanish naval interests at the time.

The Battle of Wakefield took place during the Wars of the Roses, a series of civil wars for control of the throne of England. Richard, Duke of York, was killed in this battle, which was a significant victory for the Lancastrians.

Pope Gregory XI was elected as the 201st pope of the Roman Catholic Church. He was the seventh and last of the Avignon-based popes and played a pivotal role in returning the papacy to Rome.

The Byzantine general Belisarius defeats the Vandals, led by King Gelimer, at the Battle of Tricamarum, effectively ending the Vandal Kingdom in North Africa.