Genghis Khan's Western Expedition, Battus's Western Expedition, and Hulagu's Western Expedition were all carried out under the coordination of the Mongol Great Khan, and the major kings of the great sects sent their own armies to support the war according to the custom. Judging from the final results, the three major western expeditions were carried out smoothly and achieved remarkable results. After the three western expeditions of the Mongols, the all-Mongol conquest war never happened again, but the local conquest war was still underway. One of the larger and more familiar to Chinese was Kublai Khan's conquest of the Southern Song Dynasty.
The Third Expedition ended prematurely with the death of Möngke Khan and the total annihilation of the 20,000 Mongol troops at the Battle of Ein Jalu, the farthest place the Mongol Empire could reach. Kublai Khan, who later relied on the war to ascend to power, did not get the approval of the Kuritai Assembly at all, and could no longer summon such a huge Mongolian iron horse, let alone go west again.
By the time the Ilkhanate (a Mongol regime) had marched into Syria in the gap between the civil war with the Mongol states, the Mamluks of Syria had completed the consolidation of their regimes at a time when the Mongols were killing each other, no longer the small state they had been before, but a Mamluk dynasty that had become powerful by defeating a series of crusader states on the eastern shore of the Mediterranean.
The two political positions of pro-Khan and Dumeng caused a civil war to break out in the Mongol Empire, and in the end Kublai Khan defeated the Dumeng forces of Ali Buge with the Han think tank to seize the Khan's throne, but the other three khanates did not support Kublai Khan's political position and chose to become independent from the Mongol Empire!