Century

12th Century

10 sourced events. Showing 1-10.

Events

12th Century Timeline

All Centuries

1154

Politics 12th Century Europe

Henry II Crowned King of England

Following the death of King Stephen amid the Anarchy, a civil war that had destabilized England for nearly two decades, the young Henry Plantagenet emerged as the designated successor through the Treaty of Winchester. On December 19, 1154, Henry was crowned alongside his wife Eleanor of Aquitaine at Westminster Abbey in a ceremony that symbolized the restoration of royal authority. The event marked the beginning of the Angevin or Plantagenet dynasty, which would rule England for over three centuries. Henry, already Duke of Normandy and Count of Anjou, brought continental holdings that expanded English influence across the Channel. Contemporary chroniclers noted the coronation's role in ending the prolonged conflict between rival claimants to the throne.

Event Detail

1156

Law 12th Century Europe

Privilegium Minus Elevates Austria to Duchy

In the mid-12th century, the Holy Roman Empire faced ongoing tensions between imperial authority and regional powers in Central Europe. Emperor Frederick I Barbarossa sought to stabilize his realm by reorganizing frontier territories. On September 17, 1156, at an imperial diet in Regensburg, he issued the Privilegium Minus, a formal deed that transformed the Bavarian March of Austria into an independent duchy. The document granted the territory to Henry II Jasomirgott of the Babenberg family as an inheritable fief with reduced obligations to the empire. This act separated Austria from Bavaria and established its distinct status within the empire. The decree provided the legal foundation for Austria's later development as a sovereign entity.

Event Detail

1170

Politics 12th Century Europe

Thomas Becket Assassinated in Canterbury Cathedral

In the mid-12th century, King Henry II of England sought greater control over the church by appointing his close friend and chancellor Thomas Becket as Archbishop of Canterbury in 1162. Becket, however, shifted loyalties and vigorously defended ecclesiastical independence against royal interference, leading to years of exile and bitter disputes. On December 29, 1170, four knights acting on what they interpreted as the king's wishes entered Canterbury Cathedral and murdered Becket before the high altar as he prepared for vespers. The brutal killing shocked Christendom and prompted Henry II to perform public penance. Becket was quickly canonized, and his shrine became one of Europe's most important pilgrimage sites.

Event Detail

1177

Military 12th Century Middle East & North Africa

Baldwin IV Defeats Saladin at Battle of Montgisard

In the Kingdom of Jerusalem, young King Baldwin IV, afflicted with leprosy, faced a major invasion by Saladin's Ayyubid forces from Egypt in late 1177. With limited troops after other crusader leaders departed for northern campaigns, Baldwin rallied knights including Raynald of Châtillon and Templars to confront the much larger Muslim army advancing toward Jerusalem. On November 25 near Montgisard, the crusaders launched a surprise attack on Saladin's dispersed forces. The battle resulted in a decisive crusader victory, with heavy casualties inflicted on the invaders and Saladin himself fleeing back to Cairo with only a fraction of his army intact.

Event Detail US Military Atlas

1180

Military 12th Century East Asia

First Battle of Uji Launches Japan's Genpei War

During the late Heian period in Japan, the Taira clan held dominant influence at the imperial court, marginalizing rival Minamoto families. Prince Mochihito, backed by Minamoto no Yorimasa, issued a call to arms against the Taira in an attempt to restore Minamoto power. On June 20, 1180, Taira forces intercepted and defeated the rebels at the Uji River near Kyoto after the plot was discovered. Prince Mochihito and Yorimasa were killed in the fighting. Though a Taira victory, the clash ignited the broader Genpei War that would last until 1185.

Event Detail US Military Atlas

1187

Military 12th Century Middle East & North Africa

Saladin Begins Siege of Jerusalem

In the wake of Saladin's decisive victory at the Battle of Hattin earlier that summer, which shattered the main Crusader field army and opened much of the Kingdom of Jerusalem to conquest, the Ayyubid sultan turned his attention to the holy city itself. Jerusalem's defenders, led by Balian of Ibelin, faced severe shortages of trained soldiers amid a flood of refugees. On September 20, Saladin's forces arrived outside the walls and established siege positions. The defenders repelled initial assaults while negotiating terms. After roughly two weeks of bombardment and mining operations that breached sections of the fortifications, Balian surrendered the city on October 2 under conditions that allowed many inhabitants safe passage and ransom for others.

Event Detail US Military Atlas

1187

Military 12th Century Middle East & North Africa

Saladin Captures Jerusalem from Crusaders

By the late 12th century, the Crusader Kingdom of Jerusalem had held the holy city since 1099, but its defenses weakened after internal divisions and military setbacks. Sultan Saladin of Egypt and Syria had unified Muslim forces and sought to reclaim the city central to Islamic, Christian, and Jewish traditions. After decisively defeating the Crusader army at the Battle of Hattin in July 1187, Saladin advanced on Jerusalem and began a siege in September. On October 2, after negotiations led by defender Balian of Ibelin, the city surrendered peacefully rather than face assault. Saladin allowed most inhabitants to ransom their freedom and depart in an orderly manner, avoiding the mass slaughter that had occurred during the Crusader conquest nearly nine...

Event Detail US Military Atlas

1190

Military 12th Century Middle East & North Africa

Holy Roman Emperor Frederick Barbarossa Drowns in River

In the late twelfth century, the Third Crusade drew major European leaders to reclaim Jerusalem after Saladin's victories. Holy Roman Emperor Frederick I Barbarossa, a seasoned ruler who had consolidated power in Germany and Italy, led a massive German army overland through the Balkans and Anatolia. On June 10, 1190, while crossing the Saleph River near Silifke in Cilicia, Barbarossa drowned after his horse slipped or he was overcome by the current. His death triggered widespread grief and logistical collapse among the crusaders. Most of the army disbanded or returned home, with only a remnant under his son reaching Antioch. The emperor's body was partially preserved for transport, but the loss severely weakened the German contribution to the crusade.

Event Detail US Military Atlas

1191

Military 12th Century Middle East & North Africa

Richard I Defeats Saladin at Battle of Arsuf

During the Third Crusade, European forces sought to recapture Jerusalem from Muslim control after earlier setbacks like the Battle of Hattin. Led by King Richard I of England, the Crusader army marched south along the Palestinian coast from Acre toward Jaffa, facing constant harassment from Saladin's Ayyubid forces. On September 7, 1191, near Arsuf, Saladin committed his full army of roughly 25,000 cavalry in an attempt to break the Crusader column. The Crusaders, numbering around 11,000 to 20,000 including infantry and knights from various orders, maintained discipline under Richard's command until a timely countercharge by the Hospitallers and supporting cavalry routed the attackers. The victory allowed the Crusaders to secure the central Palestinian coast, including Jaffa, though it did not...

Event Detail US Military Atlas

1192

Politics 12th Century East Asia

Minamoto Yoritomo Appointed First Shogun of Japan

By the late 12th century, Japan had endured the Gempei War between the Minamoto and Taira clans, which ended with Minamoto victory in 1185 and left the imperial court weakened. Minamoto no Yoritomo, having consolidated power through alliances and military control, received formal recognition from Emperor Go-Toba. On July 12, 1192, the court granted him the title of seii taishogun, establishing the Kamakura shogunate as Japan's first military government. This appointment shifted real authority from the emperor and aristocracy to a warrior class led by Yoritomo, who ruled from Kamakura while maintaining nominal imperial oversight. The new bakufu system centralized military administration through shugo constables and jito stewards across provinces.

Event Detail