The French developed a plantation economy to promote the export of tobacco, indigo, tea and coffee. However, they largely ignored the increasing demands for civil rights and self-government. A nationalist political movement soon emerged, with leaders like Phan Bội Châu, Phan Châu Trinh, Phan Đình Phùng, Emperor Hàm Nghi, and Hồ Chí Minh fighting or calling for independence. This resulted in the 1930 Yên Bái mutiny by the Vietnamese Nationalist Party (VNQDĐ), which the French quashed. The mutiny caused an irreparable split in the independence movement that resulted in many leading members of the organisation becoming communist converts.