Kublai offered some autonomy to the Song Emperor Lizong, if only Lizong would surrender his dynasty. Lizong imprisoned the emissary sent to deliver this offer, and rebuffed a delegation sent to ask for the emissary's release. So Kublai had two siege machine experts prepare to destroy fortresses in Song China.
In order to be sen as a traditional Chinese emperor and gain the loyalty of millions, he started calling his regime Dai Yuan, Chinese for "Great Beginnings." He moved his capital to Khanbaliq, which is now called Beijing. Of course conservative and traditional Mongols were outraged at the changes. Many followers turned from him and looked to Kaidu of the Ögedei Khanate.
Kublai's war with the Song Dynasty lasted two decades. The imperial family surrendered in 1276, but others in southern China kept fighting. They were finally conquered in 1279 after a naval battle on 19 March. For the first time, China was a united country under a non-Chinese ruler. Kublai was generous to the remains of the imperial family: they were given tax-free property in the capital, and Kublai's wife looked after their well-being. (Kublai did eventually send the child emperor Gong to become a monk.
With the absorption of the Song Dynasty, Kublai's empire now included many technological advancements, the ones that Marco Polo commented on in the record of his travels. Tomorrow we'll bring Kublai, the Song, and Marco together.
