Ngo Quyen died in 944 and his kingdom collapsed into chaos and disturbances between 12 Viet warlords and chiefs. In 968, the Việt leader Đinh Bộ Lĩnh united them and established the Đại Việt (Great Việt) kingdom. With assistance of powerful Buddhist monks, Đinh Bộ Lĩnh chose Hoa Lư in the southern edge of the Red River Delta as the capital instead of Tang-era Dai La, adopted Chinese-style imperial titles, coinage, and ceremonies and tried to preserve the T’ang administrative framework. In 979 Dinh Bo Linh was assassinated, and Queen Duong Van Nga married with Dinh's general Le Hoan, appointed him as king. Disturbances in Dai Viet attracted attentions from neighbouring Chinese Song dynasty and Champa Kingdom, but they were defeated by Le Hoan. In 982 the Vietnamese attacked and destroyed Champa's capital Indrapura and Đại Việt was recorded in Arab chronicle Al-Fihrist as the "Luqin" (Long Biên) kingdom. A Khmer inscription dated 987 records the arrival of Vietnamese merchants (Yawana) in Angkor. Chinese writers, Song Hao, Fan Chengda and Zhou Qufei, both reported that the Việt "tattooed their foreheads, crossed feet, black teeth, bare foots and blacken clothing."