What's the history of the samurai?

The samurai, was a class of highly skilled warriors, gradually developed in Japan after the Taika reforms of 646 AD. In the early Heian, the late 8th and early 9th centuries, Emperor Kammu sought to consolidate and expand his rule in northern Honshu. He then introduced the title of Seiitaishogun or shogun and began to rely on the powerful regional clans to conquer the Emishi. Skilled in mounted combat and archery, these clan warriors became the emperor's preferred tool for putting down rebellions. Even though they may have been educated, the Imperial court officials considered 7th to 9th century warriors to be crude and barbaric. During the Heian period, the emperor's army was disbanded and the emperor's power gradually declined.