The Emperor Taizong of the Tang dynasty sent an army to attack the Goguryeo in 645.
Taizong’s armies invaded Song territory from the west and from the north.
The first site of worship—the Five Dragon Temple—was constructed at the behest of emperor Taizong in the early Tang Dynasty (618–907).
The ancient city was the scene a major battle between the Tang dynasty Chinese emperor Taizong and the Goguryeo in 645 AD.
For the empress of Taizong in the Tang Dynasty see Empress Zhangsun.
In 656, Du Zhenglun was serving as the deputy minister of treasury, when Emperor Taizong's son and successor Emperor Gaozong promoted him to serve as Huangmen Shilang (黃門侍郎), the deputy head of the examination bureau (門下省, Menxia Sheng).
Zhen Guan Chang Ge, a 2006 Chinese television series based on the events of the Zhenguan era, starring Tang Guoqiang as Emperor Taizong.
By 627, Emperor Taizong, hearing this, was contemplating attacking the Eastern Turkic Khaganate, and he consulted the chancellor Xiao Yu and his brother-in-law Zhangsun Wuji.
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With much internal troubles, Ashina Duobi was unable to aid Liang, and later in 628, with Emperor Taizong's brother-in-law Chai Shao (柴紹) sieging Liang's capital Shuofang (朔方, in modern Yulin, Shaanxi), Liang Shidu's cousin Liang Luoren (梁洛仁) assassinated Liang Shidu and surrendered, ending the final rival claim to Emperor Taizong's for China's imperial throne.
Both Shule and Yutian then also submitted to Tang, allowing the Tang Dynasty to dominate the region until it was briefly seized by Tufan (Tibet) during the reign of Emperor Taizong's son Emperor Gaozong.
Empress Xiao Wen (蕭溫) (died 936), Khitan empress of the Liao Dynasty, married to Emperor Taizong
Late in the reign of Emperor Taizong, the chancellor Ma Zhou, knowing Li Jingxuan's talent, recommended him to be a resident scholar to study with Emperor Taizong's crown prince Li Zhi.
In 628, Li Tai's title was changed to Prince of Yue (Taizong made another royal member Li Baoding (李保定) heir to Li Xuanba instead of him), and he was made the commandant at Yang Prefecture (揚州, roughly modern Yangzhou, Jiangsu), but was not sent to Yang Prefecture, remaining at the capital Chang'an instead.