Kang I-sik

He is mentioned in the genealogy of Jinju Kang clan and the Joseon Sanggosa, written by Shin Chae-ho.

In 598, King Yeongyang launched a joint preemptive invasion with the Malgal against Chinese Sui dynasty outposts along the border in present-day Hebei province.

Sui Emperor Wendi ordered his fifth and youngest son, Yang Liang (assisted by the co-prime minister Gao Jiong), and Admiral Zhou Luohou, to conquer Goguryeo with an army and navy totaling 300,000.

The unseasonably heavy rain made the army's progress almost impossible and hampered the transport of provisions.

Zhou's navy also came across their own challenges, contending with rough seas, losing many ships despite staying close to the coastline.