How many times has Li Shimin been to Koguryo?

I called * * * three times, but only once, that is, in the nineteenth year of Zhenguan (645).

During the Sui and Tang Dynasties, Goguryeo's conquest lasted for more than 70 years.

The first war took place in 598, and in the eighteenth year of Emperor Kai of Sui Dynasty, Goguryeo provoked and the Sui Dynasty fought back.

The second time happened in 6 12. Yang Di the Great did great things for nine years, and the Sui Dynasty was defeated, which laid the foundation for the demise of the Sui Dynasty.

The third time was 6 15, that is, the great cause was twelve years, but it failed, and the Sui Dynasty itself was in chaos first.

The fourth time, the Tang Dynasty hit Goguryeo in 645, which was the personal expedition of Emperor Taizong in the 19th year of Zhenguan. Win, but not destroy the country.

The fifth time, in 647, in the twenty-first year of Zhenguan, I sent my son to apologize.

The sixth time, in 648, in the twenty-second year of Zhenguan, I was defeated.

The seventh time, in 655, Yonghui in Li Zhi, Tang Gaozong was six years old.

The eighth time, in 658, Emperor Gaozong celebrated three years.

The ninth time, in 659, was celebrated for four years.

The tenth time, in 660, was celebrated for six years.

The eleventh time, 66 1 -662, the Tang Dynasty was defeated.

The twelfth time, 668 -668, Gaozong was sealed for two or three years, which was the last battle of Koguryo's demise.