was killed in Bố Hải Khẩu (now Thái Bình Province) by his subordinate general, Lã Xử Bình . Lã Xử Bình then took control of the royal capital at Cổ Loa. Prince Ngô Xưong Xí, the son of King Ngô Xương Văn, inherited the throne, but he could not maintain his father's authority. He retreated to the area of Bình Kiều and established his power base there. When the Ngô dynasty collapsed under Lã Xử Bình's rebellion, Tĩnh Hải Quân became a power vacuum and divided into 12 domains where each was administered by a powerful warlord converging into three main factions during the conflict: the Ngô dynasty royalists under Ngô Xương Xí; military junta under Lã Xử Bình in Cổ Loa; and the regional governorship under Trần Lãm. Other minor lords eventually joined in and formed alliances among the three main factions of the conflict. Đinh Bộ Lĩnh's Unification war Đinh Bộ Lĩnh, adopted son of Lord Trần Lãm who ruled the region of Bố Hải Khẩu (now Thái Bình Province), succeeded Lãm after his death. In 968, Đinh Bộ Lĩnh defeated the other eleven major warlords and reunified the nation under his rule. In the same year, Đinh Bộ Lĩnh ascended the throne, proclaiming himself emperor with the title Đinh Tiên Hoàng, establishing the Đinh dynasty, and he renamed the nation as Đại Cồ Việt ("Great Viet"). He moved the capital to Hoa Lư (modern-day Ninh Bình). List of 12 lords Ngô Xương Xí held Bình Kiều, now Khoái Châu, (Triệu Sơn - Thanh Hóa) Thanh Hóa Province. Đỗ Cảnh Thạc referred himself as the Duke Đỗ Cảnh (Đỗ Cảnh Công), held Đỗ Động Giang, now Thanh Oai, Hà Nội (Chinese) Trần Lãm referred himself as the Duke Trần Minh, held Bố Hải Khấu, Kỳ Bố, Thái Bình Province Kiều Công Hãn referred himself as Kiều Tam Chế, held Phong Châu – Bạch Hạc, Phú Thọ Province (Chinese) Nguyễn Khoan referred himself as Nguyễn Thái Bình, held Tam Đái - Vĩnh Tường, Vĩnh Phúc Province Ngô Nhật Khánh referred himself as the Duke Ngô Lãm (Ngô Lãm Công), held Đường Lâm, Sơn Tây, Hà Nội Lý Khuê referred himself as Lý Lãng Công, held Siêu Loại - Thuận Thành, Bắc Ninh Province. Nguyễn Thủ Tiệp referred himself as Nguyễn Lệnh Công, held Tiên Du, Bắc Ninh Province (Chinese) Lã Đường referred himself as the Duke Lã Tá, held