Page "Sui Dynasty" Paragraph 16

In all four main campaigns, the military conquest ended in failure.

Many Sui soldiers were defeated by the prominent army leader Eulji Mundeok of Goguryeo-in prominent battles such as The Battle of Salsu River.

According to the Book of Tang, of the 305, 000 Chinese troops, only 2, 700 returned to China ( although the Tang was known to have exaggerated the failures of their predecessors to justify their own rule ).