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Hoành Sơn Range is a mountain range in the North Central Coast region of Vietnam. The range runs from Annamite Range to the South China Sea in southern Hà Tĩnh Province and northern Quảng Bình Province. It's the natural borderline of these two provinces. The length of this range is about 50 km. It crosses National Route 1 in Ngang Pass.

History

The Hoành Sơn mountains once served as a natural barrier between Dai Viet and Champa from 938 to 1069 when it was annexed by Vietnamese Lý dynasty and the site of the 30 km-long Kỳ Anh barrier built by Champa. The border of two countries was moved to the north of Quảng Trị province

References

1. cand.com.vn. "Dùng dằng Hoành Sơn Quan". Báo Công an Nhân dân điện tử (in Vietnamese). Retrieved 2024-02-01.
2. VnExpress. "Thành lũy dài hơn 30 km làm bằng đá son". vnexpress.net (in Vietnamese). Retrieved 2024-02-01.

• North Central Coast