For ten points, name this empire based in Angkor, which once ruled Cambodia.
This empire was forced to pay tribute by the Mongol General Sagatu, and after its destruction this empire was briefly restored by King Barom Reachea. Important sources for the history of this empire include the diary of Zhou Daguan, a Chinese diplomat who visited it on behalf of the Yuan dynasty. This empire's first major capital was Yasodharapura. It fought successful wars against its eastern neighbor, the (*) Champas, but was finally vanquished by its southern neighbor, the Ayutthaya Empire. Featuring many kings named Suryavarman and Jayavarman, this empire is perhaps best known for a temple complex in its capital. For ten points, name this empire based in Angkor, which once ruled Cambodia.
This empire was forced to pay tribute by the Mongol General Sagatu, and after its destruction this empire was briefly restored by King Barom Reachea.
{Khmer} Empire [accept {Kambuja} Empire until “Cambodia”]