First Crusade Timeline

Reign of Byzantine emperor Alexios I Komnenos.

Reign of Pope Urban II.

The First Crusade is formed to recapture Jerusalem for Christendom. It is successful in its primary aim.

Byzantine emperor Alexios I Komnenos appeals to the west for aid against the Seljuks.

At the Council of Clermont, Pope Urban II calls for the First Crusade to form and retake Jerusalem for Christendom.

The people's army led by Peter the Hermit departs for Constantinople during the First Crusade.

The "People's Crusade" led by Peter the Hermit is wiped out by a Seljuk army near Nicaea.

The 'People's Crusade' is wiped out near Nicaea by a Seljuk army.n

The First Crusaders arrive at Constantinople.

The First Crusaders capture Nicaea.

A Crusader army wins a great victory against a Muslim army at Dorylaion.

Baldwin of Boulogne takes control of Edessa and the County of Edessa is formed, one of four Crusader-created states in the Levant.

The First Crusaders capture Antioch after an 8-month siege.

The Crusaders defeat a large Muslim army sent to recapture Antioch.

The Crusader army arrives at the walls of Jerusalem, the objective of the First Crusade.

A small fleet of Genoese and English ships arrives at Jaffa bringing essential supplies for siege weapons to the First Crusaders at Jerusalem.

Siege towers are built by the First Crusaders to better attack Jerusalem.

Jerusalem is captured during the First Crusade.

A Muslim army is sent to recapture Jerusalem but is defeated by the Crusaders at the battle of Ascalon.

Caesarea is captured by the Crusaders.

Acre is captured by the Crusaders.

Albert of Achen's account of the First Crusade, the 'Jerusalem History", is written based on soldiers accounts.