La Vang
In August 1798, Emperor Cảnh Thịnh of the Tây Sơn regime in Huế, suspecting that Catholic civilians in Quảng Trị supported and allied with his enemy Nguyễn Ánh, who tolerated Christianity, ordered soldiers to pogrom the Catholics. More than 10,000 Catholic civilians in Quảng Trị were massacred; it was during this time that a Marian apparition of Our Lady of La Vang was reported.