The Vietnam People's Navy (VPN; ), or the Naval Service (), also known as the Vietnamese People's Navy or simply Vietnam/Vietnamese Navy (), is the naval branch of the Vietnam People's Army and is responsible for the protection of the country's national waters, islands, and interests of the maritime economy, as well as for the co-ordination of maritime police, customs service and the border defence force. History Pre–Modern Period Vietnam War On 19 July 1946, Acting President of Democratic Republic of Vietnam (DRV) Huỳnh Thúc Kháng signed into law a decree establishing the modern Vietnamese navy. Then, on 10 September of that year, General Võ Nguyên Giáp started to build a flotilla as the core of the new navy. On 8 March 1949, Vietnam established the Department of Naval Research under the General Staff. This department has performed both research and training to prepare for combat missions. Following the Geneva Conference in 1954, the DRV went about creating its own naval forces. On 7 May 1955 the Vietnam People's Navy was created with the establishment of the General Directorate of Coastal Defence, it formed the basis for the Navy Operational Command (based on the Vietnamese Ministry of Defence decree No. 284/ND signed by General Võ Nguyên Giáp to established Naval Research Board, under the General Staff, on 8 March 1949). The primary mission of the Navy was to patrol the coastal areas and the inland waterways. Throughout the Vietnam War the role played by the Vietnam People's Navy (or North Vietnamese Navy) was largely unknown to the public. However, on 2 August 1964, three North Vietnamese Swatow-class patrol boats attacked the destroyer in what became known as the Gulf of Tonkin Incident. The second attack, which the United States claimed to have occurred on 4 August, was dismissed by the North Vietnamese as a fabrication. The North Vietnamese, however, had maintained their own version of the events which took place. According to official VPN accounts Maddox penetrated North Vietnamese waters on 31 July 1964, and provoked a battle with the North Vietnamese. In response to American provocation, three 123K-class torpedo boats from the 135th Torpedo Boat Battalion were dispatched to intercept the American destroyer. The resulting clash became known as the 'Battle of Thanh Hóa' in which North Vietnamese "torpedo boats succeeded in driving the Maddox out of Vietnam's territorial waters, shooting down a U.S. aircraft and damaging another". Apart