First campaign in the Goguryeo–Tang War in the context of Li Shiji

Korea's military history spans thousands of years, beginning with the ancient nation of Gojoseon and continuing into the present day with the countries of North Korea and South Korea, and is notable for its many successful triumphs over invaders.

Throughout its history, Korea has boasted numerous exceptional leaders who gained outstanding victories against numerically superior enemies. Famed leaders credited with defending Korea against foreign invasions include: Ŭlchi Mundŏk of Goguryeo, who defeated Sui China during the Goguryeo–Sui War; Yŏn Kaesomun of Goguryeo, who defeated Emperor Taizong of Tang China during the Goguryeo–Tang War; Kang Kam-ch'an of Goryeo, who defeated the Khitan Empire during the Goryeo-Khitan War; Ch'oe Yŏng and Yi Sŏnggye of Goryeo, who defeated the Red Turbans during the Red Turban Invasions; and Yi Sun-shin of Joseon, who defeated the Japanese at sea during the Imjin War.