Quick answerWho was Mai Thúc Loan and why is he called Hắc Đế?
Mai Thúc Loan was from Thiên Lộc district, Hà Tĩnh province, and led the 722 uprising against the Tang. He is called Hắc Đế because of his very dark skin, as recorded in Trần Trọng Kim's Việt Nam sử lược.
From the article “Mai Thúc Loan and Phùng Hưng: Two Major Uprisings Under Tang Rule”
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