Bu Wiyeom was a General of Goguryeo

Goguryeo

Goguryeo or Koguryŏ was an ancient Korean kingdom located in present day northern and central parts of the Korean Peninsula, southern Manchuria, and southern Russian Maritime province....

 during King Dongmyeong's reign. Little is known about him, except that King Dongmyeong sent him to conquer the Northern Okjeo

Okjeo

Okjeo was Korean tribal state which arose in the northern Korean peninsula from perhaps 2nd century BCE to 5th century CE.Dong-okjeo occupied roughly the area of the Hamgyŏng provinces of North Korea, and Buk-okjeo occupied the Duman River region.Dong-okjeo was often simply called Okjeo, while...

 in 28 BC. It is unknown whether he was successful or not, but regardless of this, during the 5th century, Okjeo was completely conquered by Gwanggaeto the Great of Goguryeo

Goguryeo

Goguryeo or Koguryŏ was an ancient Korean kingdom located in present day northern and central parts of the Korean Peninsula, southern Manchuria, and southern Russian Maritime province....

.