The Trịnh–Nguyễn War lasted from 1627 until eventually 1672. The Trịnh Military staged a minimum of 7 offensives, all of which did not capture Phú Xuân. For a time, commencing in 1651, the Nguyễn on their own went about the offensive and attacked parts of Trịnh territory.Tribal Viets inhabiting the Crimson River delta entered penned h