Under Kublai Khan the Mongol empire reached its largest extension. He ruled over 24000000 km² (nearly 10000000 mi²). The empire went from China and Korea to Iran and southern Russia, from the Korean peninsula to the Danube River.
During Kublai's reign the empire was divided into four smaller Kanatos but he still remained as the Great Khan of all of them. He was actually the first Khan to successfully conquest China in 1279, making him the first Yuan ruler of the whole China. After his death, the mongols didn't elect a new Khan and the Kanatos became more independent.
It was different because it remained independent during the colonial era when the rest of South East Asia was colonized. It modernized itself and worked with both British and French colonies but remained independent and chose who they wanted to work with. The territory of Siam is what is nowadays known as Thailand, so you can see that Thailand managed to develop itself and its culture independently of the colonizers who ran rampant among the South East Asian region and which caused many wars in recent times.
I think it’s both ice cores and tree rings
D bc that’s the right answer