Browse Historical Events by Day: What Happened on September 29th?

King Æthelred the Unready orders the massacre of Danes living in England, known as the St. Brice's Day massacre, as a response to a perceived Danish threat.

The Crusader army of King Baldwin I of Jerusalem is ambushed by Muslim forces near Beirut, Lebanon, resulting in heavy losses.

The Battle of Monte Porzio takes place near Rome, Italy, as forces loyal to Pope Alexander III defeat the Holy Roman Emperor Frederick I Barbarossa.

The Battle of Legnano is fought in Lombardy, Italy, where the Lombard League defeats the forces of Emperor Frederick I Barbarossa, resulting in a significant setback for imperial power.

The Battle of Sluys takes place during the Hundred Years' War, with the English fleet under King Edward III achieving a major victory over the French fleet.

King Richard II of England dies under mysterious circumstances, leading to the ascension of Henry IV to the English throne.

Michelangelo's sculpture "David" is installed next to the entrance to the Palazzo Vecchio, in Florence, Italy, replacing Donatello’s bronze sculpture of Judith and Holofernes”. More

The Battle of Lepanto takes place, where a Holy League fleet defeats the Ottoman Empire in a major naval battle, halting Ottoman expansion in the Mediterranean.

Inventor Rudolf Diesel disappeared from a steamer in route to London. His body was recovered on the shore days later. The circumstances surrounding his death are still a mystery. Some believe he may have committed suicide, while others speculate that he was murdered by coal industrialists. More

The Hindenburg Line is finally broken by the allied force with Australian and US troops spearheading this battle, given the task of breaking defenses in the center. Advances were made, but it was a struggle between the two forces. The fighting lasted four days and resulted in heavy losses. More

The Munich Agreement is signed by Germany, Italy, France, and the United Kingdom, allowing Nazi Germany to annex the Sudetenland region of Czechoslovakia. More

The stock market experiences a significant drop as the Dow Jones Industrial Average falls 777.68 points, the largest single-day point decline at that time, reflecting the deepening financial crisis and concerns over the global economy.

NASA's Lunar Reconnaissance Orbiter (LRO) and Lunar Crater Observation and Sensing Satellite (LCROSS) successfully impact the Moon's surface as part of a mission to search for water ice in the permanently shadowed regions of the lunar poles.

2009, September 29 - The H1N1 influenza virus, also known as the swine flu, is declared a global pandemic by the World Health Organization (WHO). The virus spreads rapidly worldwide, resulting in widespread illness and increased public health measures.

Indonesia is struck by a massive earthquake and tsunami.