Question

The

was when Genghis Khan united the northern
tribes. He invaded China with an army of more than 100,000 horsemen.
By 1279, he and his grandson Kublai Khan had conquered all of China,
Their empire became one of the largest in history,

Answer 1

In 1279, Kublai became the first Mongol to rule all of China when he conquered the last of the Song loyalists

Step-by-step explanation: