Goguryeo: The Grand History of the Kingdom that Ruled the Vast Manchurian PlainsGoguryeo (高句麗, 37 BCE – 668 CE) was an ancient kingdom that exerted a powerful influence across northern Korea and southern Manchuria. Along with Baekje and Silla, it was one of the major powers that defined the Three Kingdoms period of Korea. Over its more than 700-year history, Goguryeo fostered a magnificent cultu..