Kings of the Han dynasty
The kings from other dynasties (, "yìxìng wáng") were mostly remnants of the rebellion against the Qin dynasty. Following the Dazexiang Uprising, many noblemen rose in rebellion. Heirs, pretenders, and warlords called themselves "kings" and claimed sovereignty as continuations of the six states previously suppressed by Qin. Among these, Chu was the most powerful. However, its rightful ruler Huai II was assassinated on the orders of the warlord Xiang Yu and the 18 Kingdoms Xiang had formed rose in rebellion against him. Liu Bang, king of Han, ultimately defeated Chu and established the new Han dynasty. The kings who had sided with him were then permitted to maintain their titles and lands. A few other kingdoms were also formed by Liu Bang for generals and favorites.
Chinese imperialism
The ancient Han Dynasty (202 BC – 220 AD) established control over northern Vietnam, northern Korea, and the Tarim Basin of Central Asia. The short-lived Sui Dynasty (581–618 AD) reinvaded Annam (northern Vietnam) and attacked Champa (southern Vietnam), while they also attempted to conquer Korea, which failed (see Goguryeo-Sui Wars). The later Tang Dynasty (618–907) aided the Korean Silla Kingdom in defeating their two Korean rivals, yet became shortchanged when they discovered Silla was not about to allow the Tang to claim much of Goguryeo's territory (as it had been under the Chinese Han Dynasty's control a few centuries before, the Han having wrested it from native kingdoms at that time). The Tang Dynasty established control over the Tarim Basin region as well, fighting wars with the new Tibetan Empire and stripping them of their colonies in Central Asia (which was abandoned after the An Lushan Rebellion). The Song Dynasty (960–1279), in securing maritime trade routes that ran from South East Asia into the Indian Ocean, had established fortified trade bases in the Philippines. The Mongol-led Yuan Dynasty (1279–1368) made attempts to invade Japan after securing the Korean peninsula through the vassaldom of the Korean Goryeo dynasty, yet both of these military ventures failed (see Mongol Invasions of Japan).