April 14

Forces loyal to the Roman Senate defeat Mark Antony's army at the Battle of Forum Gallorum.

Forces loyal to the Roman Senate, commanded by the consuls Hirtius and Pansa alongside Octavian, defeated troops led by Mark Antony at the Battle of Forum Gallorum in northern Italy, part of the broader conflict following Julius Caesar's assassination. Though a Senate victory, both consuls died from wounds suffered in the fighting, leaving young Octavian in an increasingly powerful position.

Mieszko I, ruler of the Polans, converts to Christianity following his marriage to Doubravka of Bohemia, a foundational moment for the Polish state.

Mieszko I, the ruler who first unified the Polish lands under a single dynasty, converted to Christianity following his marriage to the Bohemian princess Doubravka, a decision that aligned the emerging Polish state with Western Christendom rather than the Orthodox East. The conversion is widely regarded by historians as a foundational moment in the establishment of Polish national and religious identity.

Bulgarian and Cuman forces defeat the Latin Empire at the Battle of Adrianople.

Bulgarian Tsar Kaloyan, allied with Cuman horsemen, inflicted a stunning defeat on the forces of the Latin Empire, the crusader state established after the sack of Constantinople, at the Battle of Adrianople, even capturing the Latin emperor Baldwin I. The victory significantly weakened the fragile Latin Empire just years after its founding.

Edward IV's Yorkist forces defeat the Lancastrians at the Battle of Barnet during England's Wars of the Roses.

Yorkist forces led by Edward IV decisively defeated the Lancastrian army at the Battle of Barnet during England's Wars of the Roses, a dynastic struggle for the English crown. The battle claimed the life of the powerful nobleman Richard Neville, known as "Warwick the Kingmaker," removing one of the conflict's most influential power brokers.

President Abraham Lincoln is shot by John Wilkes Booth at Ford's Theatre in Washington, D.C.

President Abraham Lincoln was shot in the back of the head by actor and Confederate sympathizer John Wilkes Booth while attending a play at Ford's Theatre in Washington, just days after the Confederacy's effective collapse. Lincoln, mortally wounded, was carried to a nearby boarding house, where he died early the next morning without regaining consciousness.

The RMS Titanic strikes an iceberg in the North Atlantic and begins to sink.

The RMS Titanic struck an iceberg late at night in the North Atlantic during its maiden voyage, tearing open several compartments below the waterline that were believed to make the ship virtually unsinkable. The vessel began taking on water immediately, setting in motion the disaster that would claim more than 1,500 lives within a few hours.

Spain proclaims the Second Spanish Republic as King Alfonso XIII goes into exile.

Following widespread municipal election gains by republican parties, King Alfonso XIII left Spain without formally abdicating, and leaders proclaimed the Second Spanish Republic, ending the monarchy and ushering in a period of significant social and political reform. The republic's turbulent five years ultimately gave way to civil war in 1936 following a military uprising led by General Francisco Franco.

Scientists announce the completion of the Human Genome Project, having sequenced 99 percent of the human genome with 99.99 percent accuracy.

An international consortium of scientists announced the successful completion of the Human Genome Project, having sequenced approximately 99 percent of the human genome with an accuracy exceeding 99.99 percent, two years ahead of its original schedule. The landmark achievement has since transformed medical research, enabling advances in genetic disease diagnosis, personalized medicine, and biotechnology.

Boko Haram militants abduct 276 schoolgirls from a school in Chibok, Nigeria, sparking global outrage.

Militants from the extremist group Boko Haram abducted 276 female students from a secondary school in Chibok, Nigeria, sparking international outrage and the global "Bring Back Our Girls" social media campaign. While some of the girls were later rescued or escaped, many remained missing for years, and the mass kidnapping drew renewed attention to the group's brutal insurgency in northeastern Nigeria.

The Russian warship Moskva sinks in the Black Sea after being struck by Ukrainian anti-ship missiles.

The Russian Black Sea Fleet's flagship, the Moskva, sank after being struck by Ukrainian-made Neptune anti-ship missiles, according to Ukrainian officials, in one of the most significant naval losses for Russia since World War II. Russia claimed the ship sank after an accidental fire, but the loss dealt a substantial symbolic and material blow early in its invasion of Ukraine.