Timeline of the Mongol Empire
This is the timeline of the Mongol Empire from the birth of Temüjin, later Genghis Khan, to the ascension of Kublai Khan as emperor of the Yuan dynasty in 1271, though the title of Khagan continued to be used by the Yuan rulers into the Northern Yuan dynasty, a far less powerful successor entity, until 1634.
13th century
1220s
1230s
1240s
| Year | Date | Event |
| 1240 | 6 December | Siege of Kiev (1240): Mongol Empire sacks Kiev, Halych, and Vladimir-Suzdal, so ends Kievan Rus |
| 1240 | Mongol invasions of Tibet: Doorda Darkhan sacks Reting Monastery | |
| 1241 | 9 April | Battle of Legnica: Orda defeats the combined force of Henry II the Pious, Mieszko II the Fat, Sulisław of Cracow, and Boleslaus Děpoltic |
| 1241 | 11 April | Battle of Mohi: Boroldai and Subutai defeat a combined army from the Kingdom of Hungary, Croatia, and Knights Templar |
| 1241 | December | Mongol invasion of Europe: Kadan crosses the Danube |
| 1241 | 11 December | Ögedei Khan dies on a hunting trip after lengthy drinking and his wife Töregene Khatun becomes regent |
| 1241 | Siege of Lahore (1241): A Mongol force led by Tair Bahadur sacks the city of Lahore, marking a major incursion into the Delhi Sultanate. | |
| 1242 | Mongol invasion of Europe: Mongol Empire forces Bulgaria to pay tribute | |
| 1242 | Spring | Mongol invasion of Europe: Mongol forces retreat after receiving news of Ögedei Khan's death; Batu Khan stays at the Volga River and his brother Orda Khan returns to Mongolia |
| 1242 | Mongol invasions of Anatolia: Mongols take Erzurum | |
| 1242 | Chagatai Khan dies and his grandson Qara Hülegü succeeds him | |
| 1243 | 26 June | Battle of Köse Dağ: Baiju defeats Kaykhusraw II and subjugates the Sultanate of Rum and Empire of Trebizond |
| 1244 | The Ayyubid dynasty gives tribute to the Mongols | |
| 1244 | Badr al-Din Lu'lu' of Mosul submits to the Mongol Empire | |
| 1246 | Temüge tries to seize the throne without a kurultai but fails | |
| 1246 | 24 August | Güyük Khan is elected ruler of the Mongol Empire at a kurultai on the Kherlen River |
| 1246 | Güyük Khan appoints Yesü Möngke as head of the Chagatai Khanate | |
| 1248 | 20 April | Güyük Khan dies on his way to confront Batu Khan and his wife Oghul Qaimish becomes regent |