The country of Vietnam and the Vietnamese people, from the beginning, have converged and grew in such an environment with mountains, plains and seas. From the perspective of historical research, this book has focused on exploiting and explaining the relationship between the Vietnamese people and the outside world by sea. The book's content consists of 3 parts: Part 1: Vietnamese tradition and seaward thinking; Part 2: Marine commercial location and trade relations; Part 3: Awareness of sovereignty, marine security and economy