The Eastern Roman Empire collapsed because of the Tang Dynasty

After three years of Zhenguan, Li Shimin, who had endured humiliation and burden for many years, sent Li Jing, the god of war, to lead 100,000 troops for the general to encircle and suppress the Eastern Turks, and under the leadership of Li Jing, annihilated more than 100,000 enemy troops and captured Jieli Khan. After the Eastern Turks submitted to the Tang Dynasty, the Tang Dynasty expanded its territory to the shores of Lake Baikal, and after the establishment of the Abe Protectorate, the Tang Iron Horse continued to the west. In 657 AD, the powerful Western Turks were completely annihilated, and the Ansi Capital Protectorate was set up here. And Tang Taizong was revered as the Heavenly Khan, and the Tang Dynasty also became a veritable Heavenly Khan Empire.

Like the Huns, some of the Turks escaped, in order to survive began to move west, although I could not defeat the iron horse of the Han and Tang Dynasties, but it was still very strong against the Europeans, so the nomadic people who learned the Art of War of the Tang Dynasty broke through in the west and established the world-famous Ottoman Turkish Empire, in 1453 AD the Ottoman Turkish Empire invaded Constantinople, and the fall of Constantinople marked the end of the Eastern Roman Empire that lasted for more than 1,000 years.

After the Eastern Roman Empire, which once spanned Asia, Europe and Africa, came to a complete end, Europe entered the dark feudal era.

The wings of a butterfly can set off a tornado, and even more can be expected, we are strong and prosperous.