After Toghrul rejected a proposal to wed his son and daughter to Genghis ' children, the rift between them grew until war broke out in 1203.

When last Tayan Khan was killed after a battle with Genghis Khan in 1203, his son Kuchlug with his remaining Naiman troops fled to the Kara-Khitan.

Toghrul was killed in 1203 by Naiman soldiers who failed to recognize him as the former was fleeing from a defeat by Genghis Khan.

In 1203, His father bestowed on Tolui as wife Sorghaghtani, the niece of Ong Khan.

In 1203 the Bulgarian army attacked Vukan, annexing Niš.

Aibak's protégé Muhammad bin Bakhtiyar Khalji had been appointed as a general by Muhammad of Ghor in 1203, and in 1204 he helped defeat the army of Lakshman Sen of the Sena Empire.

After a brief stint in Chernihiv, where he built the Church of St. Paraskebas, Rurik, along with his kinsmen and a Cuman army, attacked and sacked Kiev in 1203, but was repelled until Roman's death in 1205.

However 13-year-old Arthur was captured while besieging Mirabeau, and the following year he was transferred to Rouen, under the charge of William de Braose, and then vanished mysteriously in April 1203.

:... the Earl of Ulster was treacherously seized while performing penance, unarmed and barefooted, in the churchyard of Downpatrick, on Good Friday, anno 1203, and sent over to England, where the king condemned him to perpetual imprisonment in the Tower ... After de Courcy had been in confinement about a year, a dispute happening to arise between King John and Philip Augustus of France concerning the Duchy of Normandy, the decision of which being referred to single combat, King John, more hasty than advised, appointed the day, against which the King of France provided his champion ; but the King of England, less fortunate, could find no one of his subjects willing to take up the gauntlet, until his captive in the Tower, the stout Earl of Ulster, was prevailed upon to accept the challenge.

The crusaders, whose objective had been Egypt, were persuaded to set their course for Constantinople before which they appeared in June 1203, proclaiming Alexios IV as Emperor and inviting the populace of the capital to depose his uncle.

His participation in the attempted usurpation of John Komnenos the Fat in 1200 had caused him to be imprisoned until the accession of Isaac II Angelos, who was restored to the throne after having been deposed and imprisoned by his brother Alexios III, and his son Alexios IV Angelos, who were placed on the throne by the intervention of the Fourth Crusade in July 1203.

Despite his promises to the contrary, John appealed to Innocent for help, observing that the charter compromised the pope's rights under the 1203 agreement that had appointed him John's feudal lord.

John crossed over into Normandy and his forces soon captured Arthur, and in 1203, the young man disappeared, with most people believing that John had Arthur murdered.

Eleanor was the daughter of Duke Geoffrey II of Brittany, elder brother of King John, which meant that she had a better claim to the English throne than John and Henry according to Primogeniture, thus should have been queen regnant in 1203.

He was one of the noblest men among the Byzantine aristocracy, and might have succeeded to the throne in regular fashion if the Fourth Crusade had not been diverted to Constantinople in 1203.

From 1203 onwards, the family of the first Shogun Yoritomo's wife, the Hōjō clan, effectively had total control over the nation with the title Shikken ( Regent ), setting up a Hojo family court that discussed and made most of the significant decisions.

The father was widely regarded to have been King Haakon Sverresson, the leader of the birkebeiner faction in the ongoing civil war against the bagler, as Inga had been with Haakon in his hostel in Borg ( now Sarpsborg ) in late 1203.

Although they had provisions and John was moving in support of the troops, in the summer of 1203 the garrison surrendered to Philip, shortly after a siege had begun.

In 1203, William de Braose was put in charge of Arthur of Brittany, whom he had personally captured the previous year at the Battle of Mirebeau.

Hōjō Masako overheard a plot that Yoshikazu and Yoriie were hatching, and turned in her own son to Tokimasa, who did not hurt Yoriie but had Yoshikazu executed in 1203.

Petar was defeated and crossed the Neretva, continuing to rule the west and north of the Neretva, which had in 1203 been briefly occupied by Andrew II of Hungary.

With Geoffrey she had three children: Eleanor, Fair Maid of Brittany ( 1184 – 1241 ), Matilda / Maud of Brittany ( 1185 – bef 1189 ) and Arthur ( 1186 – 1203 ), the last born after Geoffrey's death.

They are first found together in 1203, as co-commanders of the garrison at the major fortress of Vaudreuil in Normandy ; they were responsible for surrendering the castle without a fight to Philip II of France, fatally weakening the English position in northern France, but although popular opinion seems to have blamed them for the capitulation, a royal writ is extant stating that the castle was surrendered at King John's command, and both Saer and Fitzwalter had to endure personal humiliation and heavy ransoms at the hands of the French.

Soon after Philip II of France seized the counties of Anjou and Touraine in 1203 and standardized the use of the livre tournois there, the livre tournois began to supersede the livre parisis ( Paris pound ) which had been up to that point the official currency of the Capetian dynasty.

Important incunabula include the encyclopaedic De Proprietatibus Rerum of Franciscan monk Bartholomew Anglicus ( c. 1203 – 1272 ) which, as a manuscript, had first appeared between 1248 and 1260 in at least six languages and after being first printed in 1470 ran to 25 editions.

Around 1203, Canute's four sons, who had lived in Swedish royal court, began to claim the throne and Sverker exiled them to Norway.

John must have convinced himself that he had fulfilled Innocent ’ s command to correct the krstjani, because the “ Confessio ” ( Abjuration ) signed at Bilino Polje by seven priors of the Krstjani church on April 8, 1203, makes no mention of errors.

But after his death a woman, Inga of Varteig, whom Håkon had taken as a concubine for a time in 1203, appeared at the Birkebeiner court with an infant son who she claimed was Håkon's son.

Japan at the time was ruled by the Shikken ( Shogunate Regents ) of the Hōjō clan, who had intermarried with and wrested control from the Shogun of the Kamakura Shogunate after his death in 1203.

In 1203, Emeric hindered Cardinal Leo, who was carrying the royal crown Pope Innocent III had bestowed on Kaloyan of Bulgaria, in Hungary.

According to the Livonian Chronicle of Henry, Semigallians formed an alliance with bishop Albert of Riga against rebellious Livonians before 1203, and received military support to hold back Lithuanian attacks in 1205.

* 1203 – Isaac II Angelos, restored Eastern Roman Emperor, declares his son Alexios IV Angelos co-emperor after pressure from the forces of the Fourth Crusade.

Alain de Lille ( or Alanus ab Insulis ) ( c. 1116 / 1117 – 1202 / 1203 ), French theologian and poet, was born in Lille, some years before 1128.

His exact date of death remains unclear as well, with most research pointing toward it being between April 14, 1202, and April 5, 1203.

# Hedwig ( d. 1203 ), married to Otto II, Margrave of Meissen

Alexios III Angelos () ( c. 1153 – 1211 ) was Byzantine Emperor from 1195 to 1203.

In the course of a plot between Philip of Swabia, Boniface of Montferrat and the Doge of Venice, the Fourth Crusade was, despite papal excommunication, diverted in 1203 against Constantinople, ostensibly promoting the claims of Alexius son of the deposed emperor Isaac.

1203 pp.

Saint Dominic met and debated the Cathars in 1203 during his mission to the Languedoc.

In the spring of 1203, Dominic joined Prior Diego on an embassy to Denmark for the monarchy of Spain.

In fact, from 1192 to 1867, the shoguns, or their shikken regents in Kamakura ( 1203 – 1333 ), were the de facto rulers of Japan, although they were nominally appointed by the Emperor.

From 1192 to 1867, sovereignty of the state was exercised by the shoguns, or their shikken regents ( 1203 – 1333 ), whose authority was conferred by Imperial warrant.

However, although the use of hastily improvised fireships is mentioned during the 1203 siege of Constantinople by the Fourth Crusade, no report confirms the use of the actual Greek fire.

It was published as RFC 1203 in 1991.

* 1203 – The Fourth Crusade captures Constantinople by assault.

Further desertions of John's local allies at the beginning of 1203 steadily reduced John's freedom to manoeuvre in the region.

In late 1203, John attempted to relieve Château Gaillard, which although besieged by Philip was guarding the eastern flank of Normandy.

1203 – 1242 ), also of the Sayfawa dynasty.

Ghana survived in a diminished form until Kumbi Saleh was destroyed in 1203 by a former vassal state, the anti-Muslim Sosso Kingdom, which ultimately controlled the southern portions of the former Ghana Empire.

1203 – fall 1263 ) was the first known Grand Duke of Lithuania and the only King of Lithuania.