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Nguyễn Cửu Vân's rampart and moat at Mỹ Tho

Back from a campaign in Cambodia, Nguyễn Cửu Vân raised a rampart from Thị Cai to Bến Tranh to guard Mỹ Tho and dug a moat outside it linking the Vũng Gù and Mỹ Tho creeks, the ditch later widened into the Bảo Định canal.

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