The Nguyễn defended these lines against numerous Trịnh offensives which lasted (off and on) from 1631 till 1673, when Trịnh Tạc concluded a peace treaty with the Nguyễn Lord, Nguyễn Phúc Tần, and so Vietnam was divided between the two ruling families.
The Nguyễn defended these lines against numerous Trịnh offensives till 1673, when Trịnh Tạc concluded a peace treaty with the Nguyễn Lord and so Vietnam was divided between the two ruling families. These lines against numerous Trịnh offensives lasted (off and on) from 1631. Nguyễn Phúc Tần was the Nguyễn Lord.