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◼︎ The Battle of Ansi Fortress is familiar to us as the legend that Emperor Taizong of Tang lost his sight after being hit by Yang Manchun's arrow. However, there is a severe lack of historical materials that can reveal the entirety of the Battle of Ansi Fortress, and most of them are Chinese records. The production team conducted on-site interviews in China to uncover Goguryeo's position and strategy at the time, which are difficult to understand from the remaining records. The exact location of Ansi Fortress began to be known after China opened up. The production team visited China and found Ansi Fortress, but currently, foreigners are strictly prohibited from entering Ansi Fortress by the Chinese government, making filming impossible. Therefore, the state-of-the-art satellite GPS and computer graphics were used to precisely restore the appearance of Ansi Fortress for the first time. Ansi Fortress was three to four months away from Chang'an due to traffic conditions at the time. Why did Emperor Taizong of Tang personally go on an expedition to fight Goguryeo in the border region? Also, why did Emperor Taizong's retreat route after losing the battle have to be through wetlands? The Goguryeo navy, whose existence has been proven only through a few historical materials, was first reported on in Janghae Islands and captured on camera the remains that prove the existence of the Goguryeo navy. #KoreanHistory #History #HistorySpecial #HistoryJournal