The battle conventionally dated to about 1235 has no surviving contemporary account. According to the Sunjata epic traditions, the exiled Manding prince Sundiata Keita returned, united Mande clans against the Sosso ruler Sumanguru Kanté and defeated him at the concluding battle of Krina, or Kirina.
The conventional date is reconstructed from oral traditions and later Arabic genealogical evidence rather than from any dated record.
The fourteenth-century writers Ibn Khaldun and Ibn Battuta support Sundiata's existence and dynasty, but neither provides a contemporary account of Kirina.
Where it happened is unknown
The exact battlefield cannot be securely identified. UNESCO's General History of Africa calls Kirina a village difficult to locate, and archaeology around the modern village associated with the tradition remains limited.
More than seventy published versions of the epic exist, including mythical, symbolic and politically adaptive material. The cock-spur weapon, the sorcery and Sumanguru's supernatural disappearance are epic motifs, not independently verified battlefield facts.
Sundiata's historical existence and broad founding role are better supported than the detailed battle scenes attributed to him.
The charter question
The victory ended the Sosso war and enabled Sundiata to establish the legal, political and ideological framework of the emerging Mali polity — although the process may have been longer and more complex than the epic's compressed narrative suggests.
A proclamation at Kurukan Fuga is part of living oral tradition, but it cannot safely be treated as a separately verified event on the battle date. An Oxford survey notes that the charter appears only in some epic versions and is absent from earlier performances.
UNESCO records the community tradition that an early-thirteenth-century assembly proclaimed a Manden Charter following a major military victory; its listing recognises the living intangible tradition, not documentary proof of a verbatim 1235 constitution.
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Traditional date. Conventionally dated here; the research places it at ~1235.
What the sources leave uncertain
No contemporary written account dates or narrates the battle. The conventional date circa 1235 is reconstructed from oral traditions and later Arabic genealogical evidence.
The Sunjata epic supplies the principal narrative, but more than 70 published versions exist and include mythical, symbolic and politically adaptive material.
The battle site’s exact location is uncertain.
The Kurukan Fuga charter was documented in its present corpus only in 1998. Scholars dispute its authenticity as a verbatim 13th-century text, and an Oxford survey calls it a relatively modern addition absent from earlier performances.
In the early winter of 1237, Batu's forces entered the Principality of Ryazan and established a camp at the river Nukhla, or Onuza.
The Novgorod First Chronicle says the invaders sent a delegation — a woman the chronicle calls a sorceress, accompanied by two men — to the Ryazan princes, demanding one-tenth of everything, including people, princes and horses.
That description belongs to the chronicle; the annalistic accounts survive in later manuscript compilations and employ conventional or literary details.
Two men named Yuri
Rather than receiving the emissaries at a single capital court, the princes of Ryazan, Murom and Pronsk went out to meet them at Voronezh, and rejected the demand.
The envoys were then allowed to proceed to Yuri Vsevolodovich, the grand prince at Vladimir, while the Ryazan princes requested his military help. He is a different man from Yuri Igorevich of Ryazan.
The chronicle says he neither came nor granted their request.
Five days
Batu's forces began the siege of Ryazan on 16 December. Five days later, on 21 December, they took and sacked the city and killed its prince.
The exact day the envoys arrived is not supplied; December 1237 is the best-supported month because the embassy preceded that securely dated siege.
Kiev was not attacked in this episode; it fell in a later campaign in December 1240.
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Traditional date. Conventionally dated here; the research places it at 1237-12.
What the sources leave uncertain
The exact day on which the envoys arrived is not supplied. December 1237 is the best-supported month because the embassy preceded the securely dated siege of 16–21 December.
The annalistic accounts survive in later manuscript compilations and employ conventional or literary details; the ‘sorceress’ description should be attributed to the chronicle, not asserted in the narrator’s voice.
The conventional December dates are modern renderings of medieval Rus chronology and should not be silently treated as contemporary Gregorian dates.
No reliable source consulted supports an exact force of 100,000 for the Ryazan embassy-and-invasion episode.
A Mongol force surprised the army that Grand Prince Yuri II of Vladimir was assembling near the Sit River. The Laurentian tradition names the Mongol commander as Burundai and dates Yuri's death to 4 March 1238.
Yuri had sent Dorozh to scout with 3,000 men. Dorozh returned warning that the Mongols had already surrounded them, and before Yuri could marshal his force the attackers arrived suddenly.
What the chronicler admits he does not know
Yuri fled, was overtaken when he reached the Sit, and was killed. The Novgorod Chronicle explicitly says that it did not know exactly how he died.
Prince Vsevolod Konstantinovich of Yaroslavl, Yuri's nephew and one of the participating Rus princes, was also killed in the battle.
The same chronicle summarises what followed by saying that Rostov and Suzdal each went its own way.
Numbers and places that will not hold
The total strength of Yuri's army is unknown. The chronicle's 3,000 refers to Dorozh's scouting force, not to the whole Rus army; the commonly listed figure of about 4,000 is not securely sourced.
The precise battlefield is disputed. The chronicles identify the Sit River but not a modern village: Bozhonka in today's Sonkovsky District is a traditional localisation, while recent work by the historian Alexander Avdeev argues from written and archaeological evidence for the river's lower reaches in modern Yaroslavl Oblast.
This was an army of Vladimir-Suzdal and allied northeastern Rus princes, and towns including Torzhok and Kozelsk went on resisting afterwards.
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What the sources leave uncertain
The precise battlefield is disputed. The chronicles identify the Sit River but not a modern village. Bozhonka in today’s Sonkovsky District is a traditional localization; recent work by historian Alexander Avdeev argues from written and archaeological evidence for the river’s lower reaches in modern Yaroslavl Oblast.
The total strength of Yuri’s army is unknown. The chronicle’s 3,000 refers to Dorozh’s scouting force, not the whole Rus’ army; the listed figure of about 4,000 is not securely sourced.
The conventional 4 March date is the historical Julian-calendar date and has not been silently converted to a proleptic Gregorian date.
The Novgorod Chronicle says Yuri was overtaken at the Sit but admits uncertainty about exactly how he died.
The noise outside Kyiv's walls was so great, the chronicle says, that people inside the city could not hear one another speak.
Winter 1240: the ice bears an army
Kyiv fell to Batu Khan on 6 December 1240 — the best-supported date among conflicting chronicle traditions. His westward campaign had reached the Dnieper after the Mongol conquest of other Rus' centers, and the army probably crossed an icebound river once winter conditions could bear its troops and heavy equipment. The city was defended not by its absent prince, Danylo Romanovych, who was away in Hungary, but by his voivode Dmytro.
The Galician–Volhynian Chronicle records that the Mongols set wall-breaking engines against the wooded Polish Gate and battered the defenses day and night until a breach opened.
The last stand at the Church of the Tithes
Mongol troops fought through the breach; Dmytro was badly wounded. Exhausted, the attackers paused on the captured wall — and overnight Kyiv's survivors threw up a second barricade around the Church of the Tithes.
In the final assault, people crowded onto the church with their possessions and part of the structure collapsed under their weight. The city fell that day — 6 December, Saint Nicholas's Day, a dating the historian Alexander Maiorov established by weighing the conflicting Rus' chronicles against Hungarian evidence. Combined with Rashid al-Din's report that Kyiv fell in nine days, the final operation reconstructs to 28 November through 6 December.
What was left
Batu reportedly spared the wounded Dmytro out of respect for the defense he had led, then continued toward Volhynia; Mongol forces advanced into Poland and Hungary in 1241. Kyiv was plundered and its craft production gutted, though the city was not literally extinguished — the often-quoted figure of 48,000 dead out of 50,000 rests on no reliable count.
The starkest surviving testimony comes from the papal envoy Giovanni da Pian del Carpine, who passed through several years later: human bones still lying in the fields, and scarcely 200 houses standing.
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Date corrected. The research places this at 1240-12-06.
What the sources leave uncertain
Some later chronicles give 19 November, but Maiorov’s comparison of the surviving chronological evidence concludes that 6 December 1240 is the most trustworthy capture date.
The 28 November start is a scholarly reconstruction rather than a plainly stated starting date in the principal narrative source.
The conventional 6 December date is the medieval Julian-calendar date; it is not a modern Gregorian conversion.
No reliable contemporary source supplies a precise casualty total or survivor count.
In a separate commentary on the anatomical portions of Avicenna's Canon, conventionally dated to around 1242, Ibn al-Nafis explicitly rejected a passage through the interventricular septum and argued that blood must reach the left ventricle from the right by way of the lungs.
The year is widely repeated in modern medical histories, but no day or month is established. Major manuscript catalogues often date the work only to the thirteenth century, and at least one modern review gives 1232 instead.
The route he proposed
His model sent blood from the right ventricle through the vessel now called the pulmonary artery into the lung, where it was dispersed in lung tissue and mixed with air.
The mixture then passed through the vessel now called the pulmonary vein to the left side of the heart. He also inferred small communications between the pulmonary vessels.
He did not claim to have seen them: his own introductory statement says practical anatomy was unavailable to him and that he relied on earlier anatomists for internal forms.
Transit, not circulation
The result was a major alternative to Galenic and Avicennian heart physiology, but it was a theory of pulmonary transit rather than a modern account of complete closed-loop systemic blood circulation.
He did not describe oxygen, gas exchange, or capillaries as observed structures. The account stayed inside medieval vital-spirit physiology: blood mixed with air in the lungs so that pneuma could be generated in the left ventricle.
No securely dated evidence shows a dramatic public reaction or institutional change in 1242 itself.
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Traditional date. Conventionally dated here; the research places it at ~1242.
What the sources leave uncertain
The year 1242 is conventional and widely repeated in modern medical histories, but no day or month is established. Major manuscript catalogues often date the work only to the thirteenth century, and at least one modern review gives 1232 instead.
Because the event is the composition or completion of a text rather than a witnessed public act, “~1242” is safer than treating it as a securely dated publication.
The strongest recent specialist formulation is “pulmonary transit,” not complete “pulmonary circulation,” because Ibn al-Nafis did not describe the modern closed circulatory system.
Whether he personally performed human or animal dissections is debated. His own introductory statement says practical anatomy was unavailable to him and that he relied on earlier anatomists for internal forms.
After a siege lasting from July 1247 — about sixteen months — Seville capitulated to Ferdinand III on 23 November 1248.
The Alcázar was delivered to the Castilians and Ferdinand's royal standard was raised on its tower, symbolising the surrender.
The prolonged blockade had worsened conditions inside the city, attempted outside relief failed, and its leaders lost hope of aid.
One month to leave
The Muslim population received one month to sell property and organise its compulsory evacuation.
Ferdinand's formal entry followed on 22 December, not on 23 November.
Seville had been governed during the siege by the military leader Axataf, or al-Saqqaf, with a council of notables — calling the defenders simply “the Almohads” obscures that recent political history.
A handover in stages
The transfer was a process rather than a single ceremony. Sources associate 23 November with the capitulation and delivery of the Alcázar, 22 December with Ferdinand's formal entry and the expiry of the agreed month, and some Arabic chronicles use 13 January 1249 for the completed loss or evacuation of the city.
The claim that Alfonso took Alicante on this same date is unsupported: documentary evidence does not securely establish Alicante's conquest date, and proposed dates range from 1248 to 1250.
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What the sources leave uncertain
The transfer was a process rather than a single ceremony. Sources associate 23 November with capitulation and delivery of the Alcázar, 22 December with Ferdinand's formal entry and the expiration of the agreed month, and some Arabic chronicles use 13 January 1249 for the completed loss or evacuation of the city.
After the Nizari imam Rukn al-Din Khurshah ordered his strongholds to submit, Alamut's commander Muqaddam al-Din Muhammad Mubariz initially resisted — doubting whether the order had been freely given — but capitulated in December 1256.
The exact Gregorian day is not securely established. The specialist sources say early December, or the end of Dhu'l-Qa'da 654; 15 December is a conventional reconstruction.
Alamut was not taken by a dramatic storming: surrender orders and negotiation delivered the fortress.
The library, then the walls
The garrison and inhabitants evacuated, Mongol forces occupied Alamut, and its fortifications were systematically dismantled.
The Mongol official and historian Ata-Malik Juvayni was permitted to inspect Alamut's library before the demolition. The library was subsequently burned, although material he selected survived.
The walls resisted the demolition: Juvayni complained about their strength even after the defenders had surrendered.
Not the end of the Nizaris
About forty fortresses surrendered on Khurshah's orders, but not every one: Gerdkuh held out until 1270.
The Persian Nizari state's political collapse is more precisely associated with Khurshah's own surrender at Maymun-Diz — a distinct castle — on 19 November, even though Alamut capitulated later.
The community was not annihilated. Nizaris recaptured Alamut in 1275, and Ismaili activity continued in the south Caspian region.
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Date disputed. Sources disagree; the research places it at ~1256-12.
What the sources leave uncertain
The exact Gregorian day is not securely established by the strongest specialist sources consulted. They variously say early December or the end of Dhu'l-Qa'da 654/December 1256; 15 December is a conventional reconstruction.
One Encyclopaedia Iranica biography of Hülegü assigns 19 November to the 'capture of Alamut,' but its specialist Khurshah entry identifies 19 November as Khurshah's surrender at Maymun-Diz and places Alamut's separate surrender at the end of December. The latter chronology better distinguishes the two fortresses.
The Persian Nizari state's political collapse is more precisely associated with Khurshah's surrender on 19 November, even though Alamut itself capitulated later.
Hülegü's main host crossed the Oxus, or Amu Darya, at the end of 1255 or about 1 January 1256 — not in spring.
The crossing brought the expedition from Transoxiana into the approaches to Khurasan. The army then wintered near Shaburghan before entering Quhistan in spring.
Specialists differ only over whether the crossing belongs to the very end of 1255 or to 1–2 January 1256; neither chronology supports “spring.”
What crossed with him
Before crossing, Hülegü summoned previously submitted regional rulers to reaffirm loyalty and supply troops or resources for operations against opponents including the Nizari Ismailis.
The force incorporated siege specialists and equipment brought from China, including 1,000 households of catapult operators and “naphtha shooters.”
Ahead of the host, authorities cleared roads, reserved grazing land and prepared river crossings.
No headcount survives
The specialist survey says no precise total for Hülegü's army survives. One published reconstruction gives 70,000 people leaving Mongolia, but that is not a consensus figure for the force at the Oxus.
Juvayni and Rashid al-Din report an imperial levy of “two out of every ten men,” which historians read as indicating a large, multi-tribal force rather than a reliable count. Reported totals vary widely because sources count different stages, contingents, auxiliaries, families and support personnel.
The western expedition also did not begin here: Hülegü departed Mongolia in 1253, and Kitbuqa's advance guard was already campaigning west of the river.
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Date disputed. Sources disagree; the research places it at ~1256-01.
What the sources leave uncertain
Specialists differ slightly over whether the crossing belongs to the very end of 1255 or 1–2 January 1256. Neither chronology supports 'spring.'
Reported army totals vary widely because sources count different stages, contingents, auxiliaries, families and support personnel. The listed 80,000 and article's 138,000 should not be treated as verified headcounts.
The surviving sources do not describe Hülegü's commission identically. The Nizari strongholds were clearly an early objective; Baghdad became the target of a separate final advance at the end of 1257.
Great Khan Möngke died on 11 August 1259 during his unsuccessful campaign against the Southern Song fortress of Diaoyucheng, near modern Chongqing.
“Fishing Town” is a literal rendering of the name. It was a fortified mountain complex near Hezhou, in today's Hechuan District — a 7.7-square-kilometre site defended, according to modern archaeological-historical research, by more than 4,600 troops under Wang Jian.
The cause is genuinely disputed
Möngke's exact cause of death is unknown. Persian accounts derived largely from Rashid al-Din describe epidemic disease; Syriac and later Chinese accounts attribute it to an arrow or a stone projectile.
Rashid al-Din reports dysentery and an epidemic termed wabā, sometimes translated as cholera or plague — wording that cannot establish a modern laboratory diagnosis. Bar Hebraeus reports an arrow; later Chinese histories describe a stone.
The official Yuan annals merely say Möngke felt unwell and later died.
What followed, and when
His death ended his part of the Song campaign. The troops abandoned further operations and withdrew north with his body.
Because he had designated no successor, the death opened a struggle between his brothers Kublai and Ariq Böke. Their competing elections and open civil war followed in 1260, not that day — news travelled slowly, and Kublai reportedly did not learn of the death until mid-September.
The Toluid Civil War ran from 1260 to 1264, ending with Ariq Böke's surrender on 21 August 1264.
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Date disputed. Sources disagree about when this happened.
What the sources leave uncertain
The date and association with the failed siege of Diaoyucheng are well supported, but the cause of death is genuinely disputed.
Rashid al-Din reports dysentery and an epidemic termed wabā, sometimes translated as cholera or plague. That wording cannot establish a modern laboratory diagnosis.
Bar Hebraeus reports an arrow; later Chinese histories describe a stone projectile. The official Yuan annals merely say Möngke felt unwell and later died.
The competing succession assemblies occurred months later in 1260. It is anachronistic to place Kublai's and Ariq Böke's self-elections on 11 August 1259.
Ariq Böke came to Kublai's court at Shangdu and submitted, ending their armed contest for the title of Great Khan. A Mongolian reference work dates the surrender to 21 August 1264.
The chronology is not settled: a recent Bulletin of SOAS study dates the submission to 1263, illustrating unresolved problems in the Persian and Chinese traditions.
Rashīd al-Dīn's account says Kublai received his brother emotionally — the two embraced, and Kublai acknowledged that blame for the conflict was not entirely one-sided.
Who was spared
A subsequent princely tribunal spared Ariq Böke and the royal princes who had supported him, while several non-royal commanders were executed.
Accounts disagree about what happened to him afterwards. Some modern summaries call it imprisonment or house arrest; the recent study based on Rashīd al-Dīn says he was returned to his patrimony after the trial and died of illness in 1266.
Recent scholarship cautions against treating him as merely an illegitimate pretender: he had backing from major members of Möngke's household and senior commanders.
Why he came
Ariq Böke did not simply lose a final battlefield showdown. After the Chaghatayid ruler Alghu defected, a severe winter and famine killed many of his animals, followers deserted, and he lacked the strength either to attack Alghu again or to return securely to Mongolia.
The surrender secured Kublai's claim to the qaghanate, but did not restore effective centralised control over the western Mongol khanates.
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Date disputed. Sources disagree; the research places it at 1264-08-21.
What the sources leave uncertain
The commonly cited exact date is August 21, 1264—not August 24. A recent Bulletin of SOAS study dates the submission to 1263, illustrating unresolved chronological problems in the Persian and Chinese traditions.
Early court histories were compiled from strongly pro-Kublai materials, while Rashīd al-Dīn’s treatment gives Ariq Böke more legitimacy than many other Persian authors.
Accounts disagree over Ariq Böke’s confinement. Some modern summaries call it imprisonment or house arrest; the recent study based on Rashīd al-Dīn says he was returned to his patrimony after the trial and died of illness in 1266.
Ethiopian regnal tradition places Yekuno Amlak's accession on 10 Nehasé 1262 in the Ethiopian calendar, conventionally converted to 10 August 1270.
That date is traditional rather than independently confirmed by a contemporary chronicle. The historically defensible core is that Yekuno Amlak displaced the last Zagwe ruler and established — or, in later royal language, “restored” — Solomonic rule around 1270.
What the sources do not say
Contemporary sources do not reveal how the Zagwe were defeated, the precise location or sequence of the takeover, or Yekuno Amlak's family background. Even the identity of the last Zagwe ruler is not securely established.
The Battle of Ansata, the killing of Yetbarak in a church and the roles assigned to Tekle Haymanot or Iyäsus Moʾa derive from later traditions, and cannot be narrated as eyewitness-quality events.
The word “restoration” itself embeds the later dynasty's claim that Yekuno Amlak descended from an older Solomonic line; contemporary proof of that genealogy is absent.
What the documents do show
Early land grants show that after 1270 Yekuno Amlak consolidated authority northward and in Amhara, and cultivated a close relationship with the monastery of Däbrä Ḥayq Ǝsṭifanos.
Documents preserved there support a relationship with the monastic leader Iyäsus Moʾa, but elaborate stories about tutoring and a political pact are later hagiographic constructions.
The king's surviving records are land grants and diplomatic correspondence — not a battle narrative.
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Date disputed. Sources disagree; the research places it at ~1270.
What the sources leave uncertain
The exact August 10 date is traditional rather than independently confirmed by a contemporary chronicle.
Contemporary land grants and diplomatic correspondence attest Yekuno Amlak’s rule, but not the detailed accession story.
The Battle of Ansata, the killing of Yetbarak in a church and the roles assigned to Tekle Haymanot or Iyäsus Moʾa derive from later traditions and cannot safely be narrated as an eyewitness-quality event.
Even the word ‘restoration’ embeds the later dynasty’s claim that Yekuno Amlak descended from an older Solomonic line; contemporary proof of that genealogy is absent.
Kublai issued an edict proclaiming “Great Yuan” as the formal dynastic title of his regime on 18 December 1271 — the fifteenth day of the eleventh lunar month, Zhiyuan 8.
The edict explained that “Yuan” came from qianyuan, the “original creative force” in the Book of Changes, deliberately choosing an abstract classical principle rather than a place-name or hereditary fief.
A surviving early-fourteenth-century copy of the Yuan Statutes preserves the decree and its explanation of the name.
What else the edict carried
The edict says senior court worthies had memorialised that Kublai's completed enterprise required a magnificent formal title.
As another capstone measure, Kublai prohibited further use of precedents derived from the fallen Jin dynasty's law code.
Official documents could now identify the regime as Great Yuan.
What it did not do
It did not rename the capital. The city was still called Zhongdu on that date and became Dadu in March 1272.
Nor did it start a new era: Zhiyuan had begun in 1264, and the following year remained Zhiyuan 9. The Southern Song still held southern China, whose last resistance was defeated only in 1279.
A respected 1981 English-language study converted the date as 18 January 1272; the recent Cambridge History and the standard conversion of Zhiyuan 8, eleventh month, day 15 support 18 December 1271.
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What the sources leave uncertain
A respected 1981 English-language study converted the date as January 18, 1272. The recent Cambridge History of the Mongol Empire and the standard conversion of Zhiyuan 8, eleventh month, day 15 support December 18, 1271.
‘Founding of the Yuan dynasty’ is a useful conventional label, but Kublai had ruled since 1260 and the Southern Song continued to hold southern China until 1279.
The edict presented Great Yuan as a universal title, although Kublai’s effective authority over other Mongol khanates was limited.
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