Đac Cong & Biet Đong Thanh is a kind of military task force of Vietnam North that founded March 19th 1967 in height of the Vietnam War. The photo-book that you are holding provided a readership & researchers & historians with concise history of formation & development of this task force, its tactics & performance, and in a certain extent, with answers on some mysterious happenings of the War. Contents: 1 - Brilliant victorious battles / operations / raids. 2 - Structural organization. Special characteristics. Tactics. Recruit & training. Special skills. Gathering information. Warfare & equipment. 3 - Marine task force. 4 - Some the most representative & typical operations. The old stories but just told today by special permission.