In 968, Đinh Bộ Lĩnh established the kingdom of Đại Cồ Việt, relocated the capital to his home in Hoa Lư. At first he styled himself as "Vạn Thắng Vương" (Great Vanquishing King), then proclaimed the title emperor. In 970 Đinh Bộ Lĩnh made his reign era "Thái Bình" (Hán tự: 太平), issued the coin mining and started the tradition of Vietnamese cash coins. Đinh Bộ Lĩnh established 5 queens. In 971, Đinh Bộ Lĩnh officially published his appointments to the chief court positions. Nguyễn Bặc was placed at the head of the nobility, with the title "Nation Establishing Duke" (Định Quốc Công). Lê Hoàn, a 35-year-old military officer from Ái (Thanh Hoá) was appointed as the commander of the royal army.