[citation needed] In 1592, when Trịnh Tùng laid siege to the Eastern Capital (modern-day Hanoi), Nguyễn Hoàng lend him resources and troops.

For reasons that are mysterious, when the new Emperor, Lê Kinh Tông, ascended the throne, Nguyễn Hoàng refused to recognize the new sovereign and instead took for himself the new title of Good Prince (Huu Vuong) in 1600.

Perhaps an explanation is found in that his nephew Trịnh Tùng had been given a similar title just one year earlier: Pacifying Prince (Bình An Vương).

During his time in the south, Nguyễn Hoàng held court in multiple capitals: Ái Tử (1558–70), Trà Bát (1570–1600), and Dinh Cát (modern-day Huế, 1600–13).

Nguyễn Hoàng is still fondly remembered in central and southern Vietnam, especially in Huế where he and his descendants established their final capital.