In March 1783, the Nguyễn were again defeated, and Nguyễn Ánh and Pigneau once more set sail for Phú Quốc. Sanctuary was at once both fleeting and illusory. They had to escape again when their hideout was discovered, being chased from island to island until they reached Siam. Pigneau de Behaine visited the Siamese court in Bangkok in late 1783. Nguyễn Ánh also arrived there in February 1784, where he enlisted an army to accompany him back to Vietnam. In January 1785 however the Siamese fleet met with disaster against the Tây Sơn in the Mekong river.