Ögedei, the third son of Genghis Khan, received the kurultai’s seal at Kodoe Aral, a steppe site about 150 kilometres east of the modern capital Ulaanbaatar. The seal signified that the surviving members of the imperial family and the senior commanders had formally elected him as Great Khan, the supreme ruler of an empire that had expanded to roughly 24 million square kilometres by 1229, according to modern estimates of Mongol conquests.
The election followed the death of Genghis Khan on August 25, 1227 and the subsequent two‑year interregnum during which rival factions debated succession. The kurultai assembled approximately 1,000 nobles, a figure recorded in the Secret History of the Mongols, and required a unanimous vote to avoid civil war. Ögedei’s age, 38 years according to the Jami’ al‑tawarikh, placed him in the median range of previous Mongol leaders, and his reputation for administrative skill outweighed his younger brother Jochi’s claim, who had died in 1227.
The proclamation required the presentation of the imperial yassa, a legal code attributed to Genghis Khan. Copies of the yassa, each weighing about 0.5 kilograms, were read aloud to the assembly to confirm continuity. Ögedei pledged to uphold the yassa’s penalties, which included a fine of 10 silver ingots for unauthorized trade violations, a figure documented in a 13th‑century tax ledger from Karakorum.
After the seal was placed on Ögedei’s wrist in a ceremony lasting roughly 30 minutes, the new Great Khan ordered the capital to move from Karakorum to a more central location. Archaeological surveys estimate the distance between the two sites at 260 kilometres, a relocation that would later facilitate communication across the empire’s western and eastern fronts.
Ögedei’s accession immediately affected military organization. He appointed 12 new generals, each responsible for a tumen of 10,000 cavalry, thereby expanding the standing force to 120,000 mounted warriors. This increase enabled the 1229 campaign against the Jin dynasty, which began later that year and resulted in the capture of 30,000 prisoners, as recorded in the Yuan Shi. The consolidation of power under Ögedei thus transformed the Mongol Empire from a confederation of tribal leaders into a centrally administered state that would persist for more than a century.
Pedro Álvares Cabral arrived at Calicut on September 13, 1500, bringing a Portuguese fleet of thirteen ships and about 1,500 men to a market that had been served exclusively by Arab and Indian merchants. Until that day, Portugal’s Atlantic trade relied on the monopoly of the Madeira and Azores sugar routes and on intermittent voyages to the Atlantic islands, while the Indian Ocean spice market remained inaccessible to European powers.
The expedition was financed by King Manuel I, who had granted Cabral a royal charter to find a sea route to India and to secure a direct source of pepper, cinnamon and cloves. The fleet left Lisbon on March 9, 1500, after a failed attempt to follow Vasco da Gama’s 1497 route around the Cape of Good Hope. Cabral’s ships carried 1,200 tons of cargo, including trade goods such as cloth, metal tools and beads intended for exchange with Indian merchants.
When the fleet entered the harbor of Calicut, the local ruler, the Zamorin, received the Portuguese with a delegation of 20 envoys and offered a small quantity of pepper. Cabral negotiated a temporary trade agreement that allowed the unloading of 200 tons of goods and the loading of 150 tons of pepper and other spices onto three of his ships. The agreement was limited to a single transaction because the Zamorin was already bound by a long‑standing treaty with the Muslim merchant community, which controlled most of the city's trade.
The immediate effect was a measurable shift in the flow of wealth. In the following year, Portuguese ships returned to Lisbon with 150 tons of pepper, valued at roughly 1.2 million ducats, a profit that funded further voyages and the construction of a fortified factory at Cochin in 1503. The arrival also forced the Arab merchants to compete with a new European buyer, which altered price structures and led to occasional skirmishes over market share.
Cabral’s landing did not establish a permanent Portuguese presence in Calicut; the Zamorin expelled the remaining Portuguese ships in 1502 after a series of violent incidents. However, the expedition proved that a sea route from Europe to the Indian Ocean was viable and that direct access to spices could be obtained without overland caravans. The success encouraged the Portuguese Crown to invest in a network of forts along the Malabar Coast, laying the foundation for a colonial empire that would dominate Indian Ocean trade for the next century.
The decision by Emperor Justinian to restore imperial control over the former Roman province of Africa was taken in late 532, months before any troops arrived. Justinian appointed the general Belisarius and the senior civil official Solomon to plan a combined land and sea operation, a detail that is rarely mentioned in popular retellings. Their plan called for a rapid landing at Leptis Magna, a march inland, and a coordinated attack on the Vandal capital, Carthage, before the Vandal king Gelimer could concentrate his forces.
Belisarius landed with approximately 5,000 infantry and 500 cavalry on September 2, 533. He left a small garrison of 300 troops at the beachhead and marched north along the coastal road. Gelimer, aware of the invasion, assembled an army of about 15,000 men and positioned his forces near the ancient road called the Ad Decimum, meaning "the tenth" because it lay ten miles from Carthage. The Vandal deployment was split into three detachments: a forward guard of 4,000 under his brother Ammatus, a central force of 7,000 commanded by Gelimer himself, and a reserve of 4,000 held behind the hill of the same name.
Belisarius executed a surprise attack by sending a cavalry detachment of 300 under the officer John to strike the Vandal forward guard while his main body engaged the central force. The Vandal left wing collapsed when Ammatus was killed in the melee. Gelimer, attempting to rally his troops, arrived too late and found his brother dead. The Byzantine cavalry then turned on the reserve, causing it to flee. Contemporary sources record Vandal casualties of about 2,000 killed and 5,000 captured, while Byzantine losses were under 200.
The victory at Ad Decimum opened the road to Carthage, which fell without further fighting on October 19, 533. The Vandal kingdom was eliminated, and the province of Africa was reorganized as the Byzantine Exarchate of Africa under Solomon's civil administration. This conquest restored a major grain-producing region to imperial control and provided a base for later campaigns in Italy and Spain.
Al‑Adid was the last Fatimid caliph, ruling a shrinking realm centered on Cairo. By 1171 the Fatimid dynasty had lost most of its territories; its army relied on Kurdish mercenaries and its treasury was exhausted. The Ayyubid general Ṣalāḥ ad‑Dīn Yūsuf, who served the Syrian ruler Ṣalāḥ ad‑Dīn Yūsuf ibn Ayyūb, entered Cairo in late August with a force of about 10,000 soldiers. The Ayyubid troops secured the city gates, replaced the Fatimid flag with the black banner of the Abbasids, and placed a new administration under the control of the vizier Shams al‑Dīn al‑Maqdisī.
Al‑Adid fell ill shortly after the occupation. Contemporary chroniclers note that he was confined to his palace on the day of 13 September 1171 and that he died that evening. His death removed the last legitimate claimant to the Fatimid claim of a separate Shia caliphate. The Ayyubids immediately announced the restoration of the Sunni Abbasid caliphate, with the Abbasid caliph in Baghdad formally recognized as the sole religious and political leader of the Muslim world.
The transition was effected through a series of administrative orders. First, the new Ayyubid governor ordered the closure of the Fatimid treasury and the seizure of its remaining funds, estimated at 20,000 dinars. Second, the former Fatimid institutions, including the al‑Haramayn library and the Al‑Azhar madrasa, were placed under the supervision of Sunni scholars appointed by the Ayyubids. Third, the Ayyubid ruler ordered the removal of Fatimid coinage; within two months all circulating silver dirhams bore the inscription of the Abbasid caliph. These steps ensured that the political and religious structures of the Fatimid state were dismantled without widespread violence.
The death of Al‑Adid therefore marked the end of a dynasty that had ruled Egypt since 969 and the beginning of Ayyubid dominance that would last until the Mamluk takeover in 1250. The most immediate consequence was the consolidation of Sunni authority across Egypt and the Levant, which allowed the Ayyubids to focus resources on defending the region against the Crusader states. The shift also altered the religious landscape, as Shia Ismaili institutions were either suppressed or integrated into a Sunni framework, a change that reshaped Egyptian society for centuries.
Al‑Adid’s death thus closed the Fatimid chapter and enabled the Ayyubids to centralize power, setting the stage for the later rise of the Mamluks and the enduring Sunni character of Egyptian governance.
