Möngke Khan in the context of "Tolui"

The Song dynasty (/sʊŋ/ SUUNG) was a unifying imperial dynasty of China that ruled from 960 to 1279. The dynasty was founded by Emperor Taizu of Song, who usurped the throne of the Later Zhou dynasty and went on to conquer the rest of the Ten Kingdoms, ending the Five Dynasties and Ten Kingdoms period. The Song often came into conflict with the contemporaneous Liao, Western Xia and Jin dynasties in northern China. After retreating to southern China following attacks by the Jin dynasty, the Song was eventually conquered by the Mongol-led Yuan dynasty.

The dynasty's history is divided into two periods: during the Northern Song (北宋; 960–1127), the capital was in the northern city of Bianjing (now Kaifeng) and the dynasty controlled most of what is now East China. The Southern Song (南宋; 1127–1279) comprise the period following the loss of control over the northern half of Song territory to the Jurchen-led Jin dynasty in the Jin–Song wars. At that time, the Song court retreated south of the Yangtze and established its capital at Lin'an (now Hangzhou). Although the Song dynasty had lost control of the traditional Chinese heartlands around the Yellow River, the Southern Song Empire contained a large population and productive agricultural land, sustaining a robust economy. In 1234, the Jin dynasty was conquered by the Mongols, who took control of northern China, maintaining uneasy relations with the Southern Song. Möngke Khan, the fourth Great Khan of the Mongol Empire, died in 1259 while besieging the mountain castle Diaoyucheng in Chongqing. His younger brother Kublai Khan was proclaimed the new Great Khan and in 1271 founded the Yuan dynasty. After two decades of sporadic warfare, Kublai Khan's armies conquered the Song dynasty in 1279 after defeating the Southern Song in the Battle of Yamen, and reunited China under the Yuan dynasty.

The siege of Baghdad took place in early 1258. A large army commanded by Hulegu, a prince of the Mongol Empire, attacked the historic capital of the Abbasid Caliphate after a series of provocations from its ruler, caliph al-Musta'sim. Within a few weeks, Baghdad fell and was sacked by the Mongol army—al-Musta'sim was killed alongside hundreds of thousands of his subjects. The city's fall has traditionally been seen as marking the end of the Islamic Golden Age; in reality, its ramifications are uncertain.

After the accession of his brother Möngke Khan to the Mongol throne in 1251, Hulegu, a grandson of Genghis Khan, was dispatched westwards to Persia to secure the region. His massive army of over 138,000 men took years to reach the region but then quickly attacked and overpowered the Nizari Ismaili Assassins in 1256. The Mongols had expected al-Musta'sim to provide reinforcements for their army—the Caliph's failure to do so, combined with his arrogance in negotiations, convinced Hulegu to overthrow him in late 1257. Invading Mesopotamia from all sides, the Mongol army soon approached Baghdad, routing a sortie on 17 January 1258 by flooding their opponents' camp. They then invested Baghdad, which was left with around 30,000 troops.

The Ilkhanate or Il-khanate was a Mongol khanate founded in the southwestern territories of the Mongol Empire. It was ruled by the Il-Khans or Ilkhanids (Persian: ایلخانان, romanized: Īlkhānān), and known to the Mongols as Hülegü Ulus (lit. 'people / state of Hülegü'). The Ilkhanid realm was officially known as the Land of Iran or simply Iran. It was established after Hülegü, the son of Tolui and grandson of Genghis Khan, inherited the West Asian and Central Asian part of the Mongol Empire after his brother Möngke Khan died in 1259.

The Ilkhanate's core territory was situated in what is now the countries of Iran, Azerbaijan, and Turkey. At its greatest extent, the Ilkhanate also included parts of modern Iraq, Syria, Armenia, Georgia, Afghanistan, Turkmenistan, Pakistan, Tajikistan, and Dagestan (Russia). Later Ilkhanid rulers, beginning with Ghazan in 1295, converted to Islam. In the 1330s, the Ilkhanate was ravaged by the Black Death. The last ilkhan, Abu Sa'id Bahadur Khan, died in 1335, after which the Ilkhanate disintegrated.

Hulegu Khan, also known as Hülegü or Hulagu (c. 1217 – 8 February 1265), was a Mongol ruler who conquered much of Western Asia. As a son of Tolui and the Keraite princess Sorghaghtani Beki, he was a grandson of Genghis Khan and brother of Ariq Böke, Möngke Khan, and Kublai Khan.

Hulegu's army greatly expanded the southwestern portion of the Mongol Empire, founding the Ilkhanate in Persia. Under Hulegu's leadership, the Mongols sacked and destroyed Baghdad, ending the Islamic Golden Age and the Abbasid dynasty. They also weakened Damascus, causing a shift of Islamic influence to the Mamluk Sultanate in Cairo.

Kublai Khan (23 September 1215 – 18 February 1294), also known by his temple name as the Emperor Shizu of Yuan and his regnal name Setsen Khan, was the founder and first emperor of the Mongol-led Yuan dynasty of China. He proclaimed the dynastic name "Great Yuan" in 1271, and ruled Yuan China until his death in 1294.

Kublai was the second son of Tolui by his chief wife Sorghaghtani Beki, and a grandson of Genghis Khan. He was almost 12 when Genghis Khan died in 1227. He had succeeded his older brother Möngke as Khagan in 1260, but had to defeat his younger brother Ariq Böke in the Toluid Civil War lasting until 1264. This episode marked the beginning of the division of the Mongol Empire. Kublai's real power was limited to the Yuan Empire, even though as Khagan he still influenced the Ilkhanate and, to a significantly lesser degree, the Golden Horde.

The Battle of Ain Jalut (Arabic: معركة عين جالوت, romanized: Ma'rakat ‘Ayn Jālūt), also spelled Ayn Jalut, was fought between the Bahri Mamluks of Egypt and the Ilkhanate on 3 September 1260 (25 Ramadan 658 AH) near the spring of Ain Jalut in southeastern Galilee in the Jezreel Valley. It marks as the first major loss of the Mongolian advances and halted their expansion into Arabia and Europe.

Continuing the westward expansion of the Ilkhanate, the armies of Hulegu Khan captured and sacked Baghdad in 1258, along with the Ayyubid capital of Damascus sometime later. Hulegu sent envoys to Cairo demanding Qutuz surrender Egypt, to which Qutuz responded by killing the envoys and displaying their heads on the Bab Zuweila gate of Cairo. Shortly after this, Möngke Khan was slain in battle against the Southern Song. Hulegu returned to Mongolia with the bulk of his army to attend the kurultai in accordance with Mongol customs, leaving approximately 10,000 troops west of the Euphrates under the command of Kitbuqa.

The division of the Mongol Empire began after Möngke Khan died in 1259 in the siege of Diaoyu Castle with no declared successor, precipitating infighting between members of the Tolui family line for the title of khagan that escalated into the Toluid Civil War. This civil war, along with the Berke–Hulagu war and the subsequent Kaidu–Kublai war, greatly weakened the authority of the great khan over the entirety of the Mongol Empire, and the empire fractured into four khanates: the Golden Horde in Eastern Europe, the Chagatai Khanate in Central Asia, the Ilkhanate in Iran, and the Yuan dynasty in China based in modern-day Beijing – although the Yuan emperors held the nominal title of khagan of the empire.

The four divisions each pursued their own interests and objectives and fell at different times. Most of the western khanates did not recognize Kublai as Great Khan. Although some of them still asked Kublai to confirm the enthronement of their new regional khans, the four khanates were functionally independent sovereign states. The Ilkhanate and the Yuan dynasty had close diplomatic relations, and shared scientific and cultural knowledge, but military cooperation between all four Mongol khanates would never occur again — the united Mongol Empire had disintegrated.

Khanbaliq (Chinese: 汗八里; pinyin: Hánbālǐ; Mongolian: ᠬᠠᠭᠠᠨ ᠪᠠᠯᠭᠠᠰᠤ, Qaɣan balɣasu) or Dadu (Chinese: 元大都; pinyin: Yuán Dàdū; Mongolian: ᠳᠠᠶ᠋ᠢᠳᠤ, Dayidu) was the winter capital of the Mongol-led Yuan dynasty in what is now Beijing, the capital of China today. It was located at the center of modern Beijing. The Secretariat directly administered the Central Region (腹裏) of the Yuan dynasty (comprising present-day Beijing, Hebei, Shandong, Shanxi, and parts of Henan and Inner Mongolia) and dictated policies for the other provinces. As emperors of the Yuan dynasty, Kublai Khan and his successors also claimed supremacy over the entire Mongol Empire following the death of Möngke (Kublai's brother and predecessor) in 1259. Over time the unified empire gradually fragmented into a number of khanates.

Khanbaliq is the direct predecessor to modern Beijing. Several stations of the modern city's subway's Line 10 and Line 13 are named after the gates of Dadu.