The Sicao Fortress (traditional Chinese: 四草砲台; simplified Chinese: 四草炮台; pinyin: Báimǐwèng Pàotái) is a former fort in Annan District, Tainan, Taiwan.

The fortress was built during the First Opium War in 1840 during the Qing Dynasty rule of Taiwan by Commander Yao Ying to prevent British Empire troops from invading Taiwan.

[1] The fort was initially constructed as a temporary gun platform.

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