Medieval history · 1095–1099
The First Crusade (1095–1099): Causes, Timeline and Consequences
Why did the First Crusade begin, how did it reach Jerusalem, and what followed? Explore the political context, evidence, key battles and devastating consequences of the campaign.
What was the First Crusade?
The First Crusade was an armed expedition launched after Pope Urban II’s appeal in 1095. Separate groups from western Europe travelled toward the eastern Mediterranean, some seeking to assist Byzantine Christians and many aiming to reach Jerusalem. After hard campaigning in Anatolia and Syria, crusader forces captured Jerusalem on 15 July 1099. Their success produced Latin Christian political rule in parts of the Levant.
It is tempting to tell the story as one Christian army marching toward one objective. The reality was messier: there was no single commanding monarch, participants took different routes, the Byzantine emperor had his own strategic priorities, and relations among crusader leaders repeatedly deteriorated. Muslim powers in the region were also politically divided; some of the fiercest fighting involved different Turkish, Syrian and Egyptian authorities. The Metropolitan Museum of Art’s overview provides a concise chronology.
Equally important, the First Crusade was a campaign of profound violence. Its participants attacked Jewish communities in Europe, conquered cities and killed civilians. Understanding the religious commitments of those who joined the crusade does not excuse these actions.
Why did the First Crusade begin in 1095?
The immediate context lay in the eastern Mediterranean. The Byzantine Empire had lost substantial territory in Anatolia after its defeat at Manzikert in 1071 and subsequent political crises. Emperor Alexios I Komnenos sought western military support against Turkish opponents. His representatives approached church leaders in the West, although it would be misleading to suggest that Alexios requested exactly the kind of mass armed pilgrimage that followed.
In western Europe, Pope Urban II had reasons to promote a new movement. Reform-minded churchmen sought greater influence over Christian warfare, while Jerusalem and the Holy Sepulchre held exceptional significance for Christian pilgrimage. The pope’s appeal connected assistance to eastern Christians with penitence and a journey to sacred sites. The Cambridge History of the Crusades treats the origins as a combination of church reform, Byzantine concerns and evolving religious ideas rather than one simple cause.
The crusade also arose amid rivalry and changing relations between the Latin West and Byzantium. Help for a Christian empire did not guarantee agreement over the territories and cities that crusaders might capture.
What did Pope Urban II say at Clermont?
At the Council of Clermont in November 1095, Urban II preached an expedition to the East and associated participation with penitential spiritual benefits. The call spread through preaching networks and personal relationships. People took the cross as a sign of their commitment, helping to turn an appeal at one council into a much wider movement.
We do not possess a verbatim transcript of Urban’s speech. Several chroniclers wrote versions after the event, giving different emphases to the pope’s words. In the Fordham collection of multiple versions, Fulcher of Chartres, Robert the Monk, Baldric of Dol and Guibert of Nogent frame the message in ways shaped by their audiences and later knowledge of the crusade’s success. A later author can describe what contemporaries remembered or wished to emphasise, without recording the exact sentences heard in 1095.
This is a valuable lesson in historical method. Treating one famous version of a medieval speech as a perfect quotation risks confusing retrospective storytelling with documentary evidence.
Timeline of the First Crusade, 1095–1100
The table separates the appeal, several distinct expeditions, and the creation of new political settlements. Dates and the sequence of campaigns can be checked against the event chronology and contemporary reports collected in the Internet Medieval Sourcebook.
| When | Event | Why it mattered |
|---|---|---|
| 1095, March | Byzantine envoys seek aid at Piacenza | A broader appeal from Emperor Alexios I frames military cooperation with the West. |
| 1095, November | Council of Clermont | Pope Urban II calls for an armed expedition to aid eastern Christians and reach Jerusalem. |
| 1096, spring–autumn | Popular expeditions and Rhineland violence | Some crusading groups attack Jewish communities in the Rhineland; the so-called People’s Crusade is defeated in Anatolia. |
| 1096–1097 | Major contingents reach Constantinople | Separate armies negotiate their relationship with Alexios I and enter Asia Minor. |
| 1097, June | Siege and surrender of Nicaea | The city comes under Byzantine control after cooperation between imperial forces and western crusaders. |
| 1097, July | Battle of Dorylaeum | Crusader contingents defeat a Turkish force and continue the difficult march across Anatolia. |
| 1098, March | Edessa passes to Baldwin | An early Latin-ruled principality forms, under circumstances different from a straightforward military conquest. |
| 1098, June | Antioch captured | After a prolonged siege, crusaders take the city and repel a major relief force later that month. |
| 1099, 15 July | Jerusalem captured | Crusader forces take the city, then under Fatimid control, and commit extensive violence against its inhabitants. |
| 1099, August | Battle of Ascalon | The crusaders defeat a Fatimid field army but do not immediately take the city of Ascalon. |
| 1100 | Baldwin I becomes king of Jerusalem | Political rule develops beyond the expedition; further Crusader states emerge over subsequent years. |
The year 1100 appears here as an immediate consequence rather than as a claim that the original campaign continued unchanged. Later Crusades were separate expeditions, and the County of Tripoli formed in 1109—not in 1099.
Who joined, and why did they go?
Participants included princes, knights, clergy, servants, pilgrims and other noncombatants, including women. Men such as Raymond of Saint-Gilles, Godfrey of Bouillon, Bohemond of Taranto and Baldwin of Boulogne commanded different contingents. No king of France or England led the original expedition as its overall monarch.
Religious conviction and penitential hopes were central in crusading rhetoric. Personal loyalty and family relationships shaped who travelled with whom. Some individuals may have expected honour, reward or political opportunity; others mortgaged property or spent heavily to take part. It is inaccurate to say that everyone went exclusively for profit, or exclusively from one pure motive. Recent scholarship on crusade vows examines how medieval writers represented religious obligation and how their language could change in hindsight.
Surviving charters and chronicles are not equal windows into everybody’s mind. Elite participants left more documents than poorer travellers. When historians infer motives, they must distinguish promises in public sermons, individual financial arrangements, and claims made after the expedition.
The People’s Crusade and violence against Jewish communities
In 1096, popular movements reached the East before many of the better organised princely armies. The loosely connected groups conventionally described as the People’s Crusade included Peter the Hermit and other preachers or leaders. Some crossed to Asia Minor and suffered a devastating defeat near Nicaea in October 1096. This was not the same army that later captured Jerusalem.
During the same period, several groups of crusaders or crusade-associated fighters committed massacres against Jewish communities along the Rhine, including at Speyer, Worms and Mainz. Some local Christian authorities tried to protect Jews; the results varied. These were attacks on neighbouring communities in Europe, not battles against an opposing field army in the Holy Land.
Latin Christian and Jewish accounts preserve different memories of these events. The Internet Medieval Sourcebook’s First Crusade collection lists Jewish and Christian narratives alongside materials on the eastern campaign. Any account that presents the First Crusade only as a triumphant pilgrimage omits this essential part of its history.
The Byzantine Empire, Nicaea and Dorylaeum
The main crusader armies reached Constantinople in stages in late 1096 and 1097. Emperor Alexios I wanted military assistance and the recovery of formerly Byzantine territories. Western commanders, meanwhile, had taken their own vows and sought routes onward to Jerusalem. Agreements about future territorial control were vulnerable to distrust and different interpretations.
Nicaea, a strategically important city, surrendered in June 1097 after operations involving crusader and Byzantine forces. Its transfer to imperial control disappointed some western participants who had expected the spoils of a captured city. Soon afterwards, at Dorylaeum on 1 July 1097, crusader forces fought successfully against a Turkish army before crossing the difficult terrain of Anatolia.
Travelling an enormous distance was itself a major obstacle. Armies needed food, fodder, transport, water and local cooperation. Hunger, sickness, desertion and the loss of animals weakened them. The importance of logistics helps explain why progress was so slow despite victories in battle.
Edessa and Antioch: a campaign nearly undone
While the principal host advanced toward Syria, Baldwin of Boulogne established control at Edessa in 1098. The circumstances involved local Christian politics as well as military power and became the basis of the County of Edessa. This was an early example of how events on the ground went beyond the original appeal from Clermont.
Antioch was the central struggle of 1097–1098. Crusaders besieged the city for months, experiencing shortages and disputes while their enemies attempted to relieve it. They entered Antioch in early June 1098, but a relief army soon threatened them. Their subsequent victory preserved their position, although the prolonged crisis encouraged competing claims about leadership and ownership of the city.
Some contemporary crusader accounts described relics, visions and signs of divine aid, including the discovery of an object identified as the Holy Lance. Such reports are important evidence about medieval belief and morale; they do not prove the authenticity of the relic. The chronicle of Fulcher of Chartres is one among several sources requiring critical comparison.
Why was Jerusalem under Fatimid control in 1099?
Descriptions of the campaign sometimes say the crusaders took Jerusalem directly from the Seljuk Turks. This misses a significant change: by the time the crusaders arrived in 1099, Jerusalem was governed by the Egyptian Fatimid dynasty, which had recovered the city from its Turkish rivals in 1098.
The distinction matters because western crusaders encountered different Muslim powers with separate political interests. Neither “the Christians” nor “the Muslims” acted as a single united army or government. The Metropolitan Museum’s eastern Mediterranean chronology identifies the Fatimid governor at Jerusalem in 1099.
Local politics also shaped how Christian, Muslim and Jewish communities lived in the region. Jerusalem was sacred to all three faiths, but the meanings of its shrines and the immediate political stakes were different for the people involved.
The siege and capture of Jerusalem in July 1099
Crusader forces reached Jerusalem in June 1099 and confronted the city’s defences in difficult summer conditions. They assembled siege equipment and relied in part on supplies brought to the coast. On 15 July 1099 they breached the defences and captured the city.
The conquest was followed by killings and violence against Muslim and Jewish inhabitants. Medieval narratives describe bloodshed in dramatic language, sometimes with religious or rhetorical purpose. Modern historians generally accept the severity of the violence but disagree on precise figures, which cannot responsibly be treated as exact counts.
Christian crusading chronicles often presented the capture as fulfilment of a sacred mission. Jewish and Muslim perspectives illuminate the suffering and dislocation concealed by a solely victorious narrative. The Metropolitan Museum’s summary situates the capture within a wider history of military campaigns and changing populations. Avoid interpreting a victory narrative as a comprehensive account of everybody who lived in the city.
What happened after the First Crusade?
Political rule developed around the crusaders’ gains. Godfrey of Bouillon became the leading ruler in Jerusalem after the conquest, but he did not live long; after his death in 1100, Baldwin I took the royal title. In northern Syria, Bohemond’s position at Antioch contributed to the Principality of Antioch. Edessa had already emerged as a Latin-ruled county. The County of Tripoli came later, in 1109.
The Latin settlements depended on alliances, fortifications, diplomacy, trade, and conflict with surrounding powers. Their institutions were not simply replicas of Western European kingdoms. Local Christian communities, Muslim rulers, Jewish inhabitants, merchants and Byzantine officials all interacted with newcomers in changing ways.
The widespread construction and adaptation of strongholds forms part of this history. For background on defensive architecture, see our guide to medieval castles, keeps and siege warfare. For the broader medieval chronology, consult the Middle Ages timeline.
What were the First Crusade’s long-term consequences?
For Latin Christians in western Europe, the capture of Jerusalem encouraged further campaigns and shaped ideals of armed pilgrimage and penitence. For the populations of the eastern Mediterranean, the crusades helped reshape political boundaries and intensified warfare, while also producing long periods of trade, coexistence, negotiation and uneasy accommodation in the Latin East.
Relations between Byzantine and Latin Christian leaders also remained contentious, partly because western territorial ambitions did not always align with imperial expectations. Later episodes—especially the Fourth Crusade’s sack of Constantinople in 1204—were distinct events, not inevitable steps already planned in 1095.
The capture of Jerusalem in 1099 should not be mistaken for the final outcome of crusading. Muslim powers later recovered important territories, Jerusalem changed hands again, and by 1291 the final major mainland Latin stronghold at Acre fell. The Metropolitan Museum’s essay on the Crusades surveys the longer story.
How do historians know what happened?
Several kinds of evidence survive. Crusader letters and chronicles tell us what participants wished to report. Later Christian authors fashioned coherent narratives from messy events. Jewish narratives about the Rhineland massacres preserve experiences that victorious crusader accounts may marginalise. Muslim authors, many writing later, offer different perspectives on the campaigns and their consequences. Material remains and documentary records can help test or complicate these texts.
Take Urban’s speech as an example. The versions in the Fordham compilation agree about a call to armed action but differ in wording and emphasis. A careful historian describes them as accounts of the speech rather than claiming to possess a recording of Urban’s exact words. In the same way, estimates of army size or casualties require comparing sources and acknowledging rhetorical inflation.
| Evidence | What it helps explain | Limitations |
|---|---|---|
| Accounts of Clermont | Religious appeals and later interpretations | No verbatim transcript; written with hindsight |
| Crusader chronicles | Campaign experiences, leaders and claims | Often written to defend or celebrate participants |
| Jewish narratives | Attacks on Rhineland communities in 1096 | Selective survival; commemorative and theological framing |
| Muslim histories | Regional politics and responses to invasion | Several works compiled long after events |
| Buildings and documents | Settlement, fortification, landholding | Uneven survival and geographical coverage |
Frequently asked questions
When was the First Crusade?
Pope Urban II issued the appeal in 1095; the main expedition developed in 1096–1099 and captured Jerusalem on 15 July 1099.
Who started the First Crusade?
Pope Urban II launched the call at Clermont, partly amid Byzantine requests for assistance. The campaign involved separate armies rather than one unified expedition under one king.
Who won the First Crusade?
The crusader forces achieved their central objective of taking Jerusalem in 1099 and established political footholds in the eastern Mediterranean. The victory did not end regional warfare or determine the outcome of later crusades.
Why did people join the First Crusade?
Motives included devotion, penitence, social obligations, solidarity with eastern Christians and, for some, political or material ambitions. Individual motivations cannot be reduced to a single explanation.
Did the First Crusade kill civilians?
Yes. Attacks on Jewish communities in Europe and violence against Jerusalem’s inhabitants were significant elements of the campaign and must be included in its history.
Was Jerusalem under Seljuk rule when it fell?
No. Jerusalem was under Fatimid Egyptian control at the time of the July 1099 siege.
Historical sources and further reading
The article distinguishes academic interpretation from medieval primary narratives. For contested speeches, motives and casualty numbers, consult the sources directly rather than treating a single chronicle as a comprehensive record.
- Metropolitan Museum of Art — The Crusades (1095–1291): broad chronology, material culture and consequences
- Metropolitan Museum of Art — Eastern Mediterranean chronology: regional context and Fatimid control of Jerusalem
- Cambridge History of the Crusades — Origins of the First Crusade: historiography and religious-political origins
- Edward J. Caddy, To Bargain with God (2024): how accounts framed crusade vows and obligation
- Fordham University Internet Medieval Sourcebook — Versions of Urban II’s Clermont speech: contrasting primary-source narratives
- Fordham — Fulcher of Chartres, Chronicle of the Expedition to Jerusalem: primary chronicle in translation
- Fordham — First Crusade source collection: sources on the campaigns and attacks on Jewish communities
- World History Encyclopedia — First Crusade event timeline: quick event cross-checks
Related site guides: Medieval History, The Norman Conquest of 1066, Life in a Medieval Monastery and Medieval Castles.
Editorial note: the image used until an article-specific illustration is commissioned is decorative artwork. It is not a contemporary depiction or primary source for the First Crusade.
