Godfrey of Bouillon in the context of "Kingdom of Jerusalem"

The Nine Worthies are nine historical, scriptural, and legendary men of distinction who personify the ideals of chivalry established in the Middle Ages, whose lives were deemed a valuable study for aspirants to chivalric status. All were commonly referred to as 'Princes', regardless of their historical titles. In French they are called Les Neuf Preux or "Nine Valiants", giving a more specific idea of the moral virtues they exemplified: those of soldierly courage and generalship. In Italy they are known as i Nove Prodi.

The Nine Worthies include three pagans (Hector, Alexander the Great, and Julius Caesar), three Jews (Joshua, David, and Judas Maccabeus), and three Christians (King Arthur, Charlemagne, and Godfrey of Bouillon).

The siege of Jerusalem marked the successful end of the First Crusade, whose objective was the recovery of the city of Jerusalem and the Church of the Holy Sepulchre from Islamic control. The five-week siege began on 7 June 1099 and was carried out by the Christian forces of Western Europe mobilized by Pope Urban II after the Council of Clermont in 1095. The city had been out of Christian control since the Muslim conquest of the Levant in 637 and had been held for a century first by the Seljuk Turks and later by the Egyptian Fatimids. One of the root causes of the Crusades was the hindering of Christian pilgrimages to the Holy Land which began in the 4th century. A number of eyewitness accounts of the battle were recorded, including in the anonymous chronicle Gesta Francorum.

After Jerusalem was captured on 15 July 1099, thousands of Muslims and Jews were massacred by Crusader soldiers. As the Crusaders secured control over the Temple Mount, revered as the site of the two destroyed Jewish Temples, they also seized Al-Aqsa Mosque and the Dome of the Rock and repurposed them as Christian shrines. Godfrey of Bouillon, prominent among the Crusader leadership, was elected as the first ruler of Jerusalem.

The principality of Galilee was one of the four major seigneuries of the crusader Kingdom of Jerusalem, according to 13th-century commentator John of Ibelin, grandson of Balian. The direct holdings of the principality centred around Tiberias, in Galilee proper, but with all its vassals, the lordship covered all Galilee (now Israel) and southern Phoenicia (today Lebanon). The independent Lordship of Sidon was located between Galilee's holdings. The principality also had its own vassals, the lordships of Nazareth and Haifa.

The principality was established, at least in name, in 1099 when Tancred was given Tiberias, Haifa, and Bethsan by Godfrey of Bouillon. In 1101, Baldwin I limited Tancred's power by giving Haifa to Geldemar Carpenel, and Tancred was forced to give up the principality and become regent in Antioch. The principality became the fief of the families of St. Omer, Montfaucon (Falcomberques), and then Bures, and its main seat was in Tiberias; thus it was sometimes also called the Principality of Tiberias or the Tiberiad. The principality was destroyed by Saladin in 1187, although the title was used by relatives and younger sons of the kings of Cyprus (the titular kings of Jerusalem) afterwards, and some of its former holdings were briefly reclaimed by a treaty made during the Barons' Crusade.

The king or queen of Jerusalem was the supreme ruler of the Kingdom of Jerusalem, a Crusader state founded in Jerusalem by the Latin Catholic leaders of the First Crusade, when the city was conquered in 1099. Most of them were men, but there were also five queens regnant of Jerusalem, either reigning alone suo jure ("in her own right"), or as co-rulers of husbands who reigned as kings of Jerusalem jure uxoris ("by right of his wife").

Godfrey of Bouillon, the first ruler of the Kingdom of Jerusalem, refused the title of king choosing instead the title Advocatus Sancti Sepulchri, that is Advocate or Defender of the Church of the Holy Sepulchre. In 1100 Baldwin I, Godfrey's successor, was the first ruler crowned as king. The crusaders in Jerusalem were conquered in 1187, but their Kingdom of Jerusalem survived, moving the capital to Acre in 1191. Crusaders re-captured the city of Jerusalem in the Sixth Crusade, during 1229–1239 and 1241–1244.

Baldwin I (1060s – 2 April 1118) was the first count of Edessa from 1098 to 1100 and king of Jerusalem from 1100 to his death in 1118. He was the youngest son of Eustace II, Count of Boulogne, and Ida of Lorraine and married a Norman noblewoman, Godehilde of Tosny. He received the County of Verdun in 1096, but he soon joined the crusader army of his brother Godfrey of Bouillon and became one of the most successful commanders of the First Crusade.

While the main crusader army was marching across Asia Minor in 1097, Baldwin and the Norman Tancred launched a separate expedition against Cilicia. Tancred tried to capture Tarsus in September, but Baldwin forced him to leave it, which gave rise to an enduring conflict between them. Baldwin seized important fortresses in the lands to the west of the Euphrates with the assistance of local Armenians. Thoros of Edessa invited him to come to Edessa to fight against the Seljuks. Taking advantage of a riot against Thoros, Baldwin seized the town and established the first Crusader state on 10 March 1098. To strengthen his rule, the widowed Baldwin married an Armenian ruler's daughter (who is now known as Arda). He supplied the main crusader army with food during the siege of Antioch. He defended Edessa against Kerbogha, the governor of Mosul, for three weeks, preventing him from reaching Antioch before the crusaders captured it.

Frisian involvement in the Crusades is attested from the very beginning of the First Crusade, but their presence is only felt substantially during the Fifth Crusade. They participated in almost all the major Crusades and the Reconquista. The Frisians are almost always referred to collectively by contemporary chroniclers of the Crusades and few names of individual Frisian crusaders can be found in the historical record. They generally composed a naval force in conjunction with other larger bodies of crusaders.

The first Frisians to participate in the First Crusade were part of the army which was led to the Holy Land by Godfrey of Bouillon and they are only mentioned in passing by Fulcher of Chartres, who mentions that the Frisian language was one of the many tongues spoken by the crusaders. William of Tyre, drawing his information from Fulcher, mentions Frisians as part of the troops led by Godfrey at the Siege of Antioch in 1097–1098. According to Albert of Aix, there was also a fleet of pirates, hailing from Denmark, Frisia, and Flanders and led by Guynemer of Boulogne, who assisted Baldwin of Boulogne at Tarsus.

The following is an overview of the Christian forces of the First Crusade, including the armies of the European noblemen of the "Princes' Crusade", the Byzantine army, independent Crusaders, as well as the People's Crusade and the subsequent Crusade of 1101 and other European campaigns prior to the Second Crusade beginning in 1147. The total strength of the armies of the Princes' Crusade is estimated at 40,000, including 4,500 nobles. It has been estimated that no more than 20% were non-combatants and a cavalry-to-infantry ratio of about 1:7, for rough estimates of just below 5,000 cavalry and 30,000 infantry at the beginning of the expedition.

Unless otherwise noted, references are to the on-line database of Riley-Smith, et al., and the hyperlinks therein provide details including original sources. The names below are also referenced in the Riley-Smith tome.

The title of Advocatus Sancti Sepulchri, or Advocate of the Holy Sepulchre, has been ascribed to Godfrey of Bouillon in his role as the first Latin ruler of Jerusalem. In the aftermath of the First Crusade, there was disagreement among the clergy and secular leaders as the leadership of the Kingdom of Jerusalem. There was opposition to the naming of a king over the Holy City and the wearing of a crown in the city where Christ suffered with a crown of thorns. The original sources differ on the actual title assumed by Godfrey. However, it is generally accepted by most modern historians that, once Godfrey was selected to be leader, he declined to be crowned king instead taking the titles of prince (princeps) and advocate or defender of the Holy Sepulchre (advocatus Sancti Sepulchri).