Yang Liang
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.